zolfa
/
youtube-dl

# coding: utf-8
from __future__ import unicode_literals

import itertoolsimport jsonimport os.pathimport randomimport reimport timeimport traceback
from .common import InfoExtractor, SearchInfoExtractorfrom ..jsinterp import JSInterpreterfrom ..swfinterp import SWFInterpreterfrom ..compat import (    compat_chr,    compat_kwargs,    compat_parse_qs,    compat_urllib_parse_unquote,    compat_urllib_parse_unquote_plus,    compat_urllib_parse_urlencode,    compat_urllib_parse_urlparse,    compat_urlparse,    compat_str,)from ..utils import (    clean_html,    error_to_compat_str,    ExtractorError,    float_or_none,    get_element_by_attribute,    get_element_by_id,    int_or_none,    mimetype2ext,    orderedSet,    parse_codecs,    parse_duration,    remove_quotes,    remove_start,    smuggle_url,    str_to_int,    try_get,    unescapeHTML,    unified_strdate,    unsmuggle_url,    uppercase_escape,    urlencode_postdata,)

class YoutubeBaseInfoExtractor(InfoExtractor):    """Provide base functions for Youtube extractors"""    _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'    _TWOFACTOR_URL = 'https://accounts.google.com/signin/challenge'
    _LOOKUP_URL = 'https://accounts.google.com/_/signin/sl/lookup'    _CHALLENGE_URL = 'https://accounts.google.com/_/signin/sl/challenge'    _TFA_URL = 'https://accounts.google.com/_/signin/challenge?hl=en&TL={0}'
    _NETRC_MACHINE = 'youtube'    # If True it will raise an error if no login info is provided    _LOGIN_REQUIRED = False
    _PLAYLIST_ID_RE = r'(?:PL|LL|EC|UU|FL|RD|UL|TL)[0-9A-Za-z-_]{10,}'
    def _set_language(self):        self._set_cookie(            '.youtube.com', 'PREF', 'f1=50000000&hl=en',            # YouTube sets the expire time to about two months            expire_time=time.time() + 2 * 30 * 24 * 3600)
    def _ids_to_results(self, ids):        return [            self.url_result(vid_id, 'Youtube', video_id=vid_id)            for vid_id in ids]
    def _login(self):        """
        Attempt to log in to YouTube.        True is returned if successful or skipped.        False is returned if login failed.
        If _LOGIN_REQUIRED is set and no authentication was provided, an error is raised.        """
        (username, password) = self._get_login_info()        # No authentication to be performed        if username is None:            if self._LOGIN_REQUIRED:                raise ExtractorError('No login info available, needed for using %s.' % self.IE_NAME, expected=True)            return True
        login_page = self._download_webpage(            self._LOGIN_URL, None,            note='Downloading login page',            errnote='unable to fetch login page', fatal=False)        if login_page is False:            return
        login_form = self._hidden_inputs(login_page)
        def req(url, f_req, note, errnote):            data = login_form.copy()            data.update({                'pstMsg': 1,                'checkConnection': 'youtube',                'checkedDomains': 'youtube',                'hl': 'en',                'deviceinfo': '[null,null,null,[],null,"US",null,null,[],"GlifWebSignIn",null,[null,null,[]]]',                'f.req': json.dumps(f_req),                'flowName': 'GlifWebSignIn',                'flowEntry': 'ServiceLogin',            })            return self._download_json(                url, None, note=note, errnote=errnote,                transform_source=lambda s: re.sub(r'^[^[]*', '', s),                fatal=False,                data=urlencode_postdata(data), headers={                    'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8',                    'Google-Accounts-XSRF': 1,                })
        def warn(message):            self._downloader.report_warning(message)
        lookup_req = [            username,            None, [], None, 'US', None, None, 2, False, True,            [                None, None,                [2, 1, None, 1,                 'https://accounts.google.com/ServiceLogin?passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Fnext%3D%252F%26action_handle_signin%3Dtrue%26hl%3Den%26app%3Ddesktop%26feature%3Dsign_in_button&hl=en&service=youtube&uilel=3&requestPath=%2FServiceLogin&Page=PasswordSeparationSignIn',                 None, [], 4],                1, [None, None, []], None, None, None, True            ],            username,        ]
        lookup_results = req(            self._LOOKUP_URL, lookup_req,            'Looking up account info', 'Unable to look up account info')
        if lookup_results is False:            return False
        user_hash = try_get(lookup_results, lambda x: x[0][2], compat_str)        if not user_hash:            warn('Unable to extract user hash')            return False
        challenge_req = [            user_hash,            None, 1, None, [1, None, None, None, [password, None, True]],            [                None, None, [2, 1, None, 1, 'https://accounts.google.com/ServiceLogin?passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Fnext%3D%252F%26action_handle_signin%3Dtrue%26hl%3Den%26app%3Ddesktop%26feature%3Dsign_in_button&hl=en&service=youtube&uilel=3&requestPath=%2FServiceLogin&Page=PasswordSeparationSignIn', None, [], 4],                1, [None, None, []], None, None, None, True            ]]
        challenge_results = req(            self._CHALLENGE_URL, challenge_req,            'Logging in', 'Unable to log in')
        if challenge_results is False:            return
        login_res = try_get(challenge_results, lambda x: x[0][5], list)        if login_res:            login_msg = try_get(login_res, lambda x: x[5], compat_str)            warn(                'Unable to login: %s' % 'Invalid password'                if login_msg == 'INCORRECT_ANSWER_ENTERED' else login_msg)            return False
        res = try_get(challenge_results, lambda x: x[0][-1], list)        if not res:            warn('Unable to extract result entry')            return False
        tfa = try_get(res, lambda x: x[0][0], list)        if tfa:            tfa_str = try_get(tfa, lambda x: x[2], compat_str)            if tfa_str == 'TWO_STEP_VERIFICATION':                # SEND_SUCCESS - TFA code has been successfully sent to phone                # QUOTA_EXCEEDED - reached the limit of TFA codes                status = try_get(tfa, lambda x: x[5], compat_str)                if status == 'QUOTA_EXCEEDED':                    warn('Exceeded the limit of TFA codes, try later')                    return False
                tl = try_get(challenge_results, lambda x: x[1][2], compat_str)                if not tl:                    warn('Unable to extract TL')                    return False
                tfa_code = self._get_tfa_info('2-step verification code')
                if not tfa_code:                    warn(                        'Two-factor authentication required. Provide it either interactively or with --twofactor <code>'                        '(Note that only TOTP (Google Authenticator App) codes work at this time.)')                    return False
                tfa_code = remove_start(tfa_code, 'G-')
                tfa_req = [                    user_hash, None, 2, None,                    [                        9, None, None, None, None, None, None, None,                        [None, tfa_code, True, 2]                    ]]
                tfa_results = req(                    self._TFA_URL.format(tl), tfa_req,                    'Submitting TFA code', 'Unable to submit TFA code')
                if tfa_results is False:                    return False
                tfa_res = try_get(tfa_results, lambda x: x[0][5], list)                if tfa_res:                    tfa_msg = try_get(tfa_res, lambda x: x[5], compat_str)                    warn(                        'Unable to finish TFA: %s' % 'Invalid TFA code'                        if tfa_msg == 'INCORRECT_ANSWER_ENTERED' else tfa_msg)                    return False
                check_cookie_url = try_get(                    tfa_results, lambda x: x[0][-1][2], compat_str)        else:            check_cookie_url = try_get(res, lambda x: x[2], compat_str)
        if not check_cookie_url:            warn('Unable to extract CheckCookie URL')            return False
        check_cookie_results = self._download_webpage(            check_cookie_url, None, 'Checking cookie', fatal=False)
        if check_cookie_results is False:            return False
        if 'https://myaccount.google.com/' not in check_cookie_results:            warn('Unable to log in')            return False
        return True
    def _download_webpage(self, *args, **kwargs):        kwargs.setdefault('query', {})['disable_polymer'] = 'true'        return super(YoutubeBaseInfoExtractor, self)._download_webpage(            *args, **compat_kwargs(kwargs))
    def _real_initialize(self):        if self._downloader is None:            return        self._set_language()        if not self._login():            return

class YoutubeEntryListBaseInfoExtractor(YoutubeBaseInfoExtractor):    # Extract entries from page with "Load more" button    def _entries(self, page, playlist_id):        more_widget_html = content_html = page        for page_num in itertools.count(1):            for entry in self._process_page(content_html):                yield entry
            mobj = re.search(r'data-uix-load-more-href="/?(?P<more>[^"]+)"', more_widget_html)            if not mobj:                break
            more = self._download_json(                'https://youtube.com/%s' % mobj.group('more'), playlist_id,                'Downloading page #%s' % page_num,                transform_source=uppercase_escape)            content_html = more['content_html']            if not content_html.strip():                # Some webpages show a "Load more" button but they don't                # have more videos                break            more_widget_html = more['load_more_widget_html']

class YoutubePlaylistBaseInfoExtractor(YoutubeEntryListBaseInfoExtractor):    def _process_page(self, content):        for video_id, video_title in self.extract_videos_from_page(content):            yield self.url_result(video_id, 'Youtube', video_id, video_title)
    def extract_videos_from_page(self, page):        ids_in_page = []        titles_in_page = []        for mobj in re.finditer(self._VIDEO_RE, page):            # The link with index 0 is not the first video of the playlist (not sure if still actual)            if 'index' in mobj.groupdict() and mobj.group('id') == '0':                continue            video_id = mobj.group('id')            video_title = unescapeHTML(mobj.group('title'))            if video_title:                video_title = video_title.strip()            try:                idx = ids_in_page.index(video_id)                if video_title and not titles_in_page[idx]:                    titles_in_page[idx] = video_title            except ValueError:                ids_in_page.append(video_id)                titles_in_page.append(video_title)        return zip(ids_in_page, titles_in_page)

class YoutubePlaylistsBaseInfoExtractor(YoutubeEntryListBaseInfoExtractor):    def _process_page(self, content):        for playlist_id in orderedSet(re.findall(                r'<h3[^>]+class="[^"]*yt-lockup-title[^"]*"[^>]*><a[^>]+href="/?playlist\?list=([0-9A-Za-z-_]{10,})"',                content)):            yield self.url_result(                'https://www.youtube.com/playlist?list=%s' % playlist_id, 'YoutubePlaylist')
    def _real_extract(self, url):        playlist_id = self._match_id(url)        webpage = self._download_webpage(url, playlist_id)        title = self._og_search_title(webpage, fatal=False)        return self.playlist_result(self._entries(webpage, playlist_id), playlist_id, title)

class YoutubeIE(YoutubeBaseInfoExtractor):    IE_DESC = 'YouTube.com'    _VALID_URL = r"""(?x)^
                     (                         (?:https?://|//)                                    # http(s):// or protocol-independent URL                         (?:(?:(?:(?:\w+\.)?[yY][oO][uU][tT][uU][bB][eE](?:-nocookie)?\.com/|                            (?:www\.)?deturl\.com/www\.youtube\.com/|                            (?:www\.)?pwnyoutube\.com/|                            (?:www\.)?hooktube\.com/|                            (?:www\.)?yourepeat\.com/|                            tube\.majestyc\.net/|                            youtube\.googleapis\.com/)                        # the various hostnames, with wildcard subdomains                         (?:.*?\#/)?                                          # handle anchor (#/) redirect urls                         (?:                                                  # the various things that can precede the ID:                             (?:(?:v|embed|e)/(?!videoseries))                # v/ or embed/ or e/                             |(?:                                             # or the v= param in all its forms                                 (?:(?:watch|movie)(?:_popup)?(?:\.php)?/?)?  # preceding watch(_popup|.php) or nothing (like /?v=xxxx)                                 (?:\?|\#!?)                                  # the params delimiter ? or # or #!                                 (?:.*?[&;])??                                # any other preceding param (like /?s=tuff&v=xxxx or ?s=tuff&amp;v=V36LpHqtcDY)                                 v=                             )                         ))                         |(?:                            youtu\.be|                                        # just youtu.be/xxxx                            vid\.plus|                                        # or vid.plus/xxxx                            zwearz\.com/watch|                                # or zwearz.com/watch/xxxx                         )/                         |(?:www\.)?cleanvideosearch\.com/media/action/yt/watch\?videoId=                         )                     )?                                                       # all until now is optional -> you can pass the naked ID                     ([0-9A-Za-z_-]{11})                                      # here is it! the YouTube video ID                     (?!.*?\blist=                        (?:                            %(playlist_id)s|                                  # combined list/video URLs are handled by the playlist IE                            WL                                                # WL are handled by the watch later IE                        )                     )                     (?(1).+)?                                                # if we found the ID, everything can follow                     $""" % {'playlist_id': YoutubeBaseInfoExtractor._PLAYLIST_ID_RE}
    _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'    _formats = {        '5': {'ext': 'flv', 'width': 400, 'height': 240, 'acodec': 'mp3', 'abr': 64, 'vcodec': 'h263'},        '6': {'ext': 'flv', 'width': 450, 'height': 270, 'acodec': 'mp3', 'abr': 64, 'vcodec': 'h263'},        '13': {'ext': '3gp', 'acodec': 'aac', 'vcodec': 'mp4v'},        '17': {'ext': '3gp', 'width': 176, 'height': 144, 'acodec': 'aac', 'abr': 24, 'vcodec': 'mp4v'},        '18': {'ext': 'mp4', 'width': 640, 'height': 360, 'acodec': 'aac', 'abr': 96, 'vcodec': 'h264'},        '22': {'ext': 'mp4', 'width': 1280, 'height': 720, 'acodec': 'aac', 'abr': 192, 'vcodec': 'h264'},        '34': {'ext': 'flv', 'width': 640, 'height': 360, 'acodec': 'aac', 'abr': 128, 'vcodec': 'h264'},        '35': {'ext': 'flv', 'width': 854, 'height': 480, 'acodec': 'aac', 'abr': 128, 'vcodec': 'h264'},        # itag 36 videos are either 320x180 (BaW_jenozKc) or 320x240 (__2ABJjxzNo), abr varies as well        '36': {'ext': '3gp', 'width': 320, 'acodec': 'aac', 'vcodec': 'mp4v'},        '37': {'ext': 'mp4', 'width': 1920, 'height': 1080, 'acodec': 'aac', 'abr': 192, 'vcodec': 'h264'},        '38': {'ext': 'mp4', 'width': 4096, 'height': 3072, 'acodec': 'aac', 'abr': 192, 'vcodec': 'h264'},        '43': {'ext': 'webm', 'width': 640, 'height': 360, 'acodec': 'vorbis', 'abr': 128, 'vcodec': 'vp8'},        '44': {'ext': 'webm', 'width': 854, 'height': 480, 'acodec': 'vorbis', 'abr': 128, 'vcodec': 'vp8'},        '45': {'ext': 'webm', 'width': 1280, 'height': 720, 'acodec': 'vorbis', 'abr': 192, 'vcodec': 'vp8'},        '46': {'ext': 'webm', 'width': 1920, 'height': 1080, 'acodec': 'vorbis', 'abr': 192, 'vcodec': 'vp8'},        '59': {'ext': 'mp4', 'width': 854, 'height': 480, 'acodec': 'aac', 'abr': 128, 'vcodec': 'h264'},        '78': {'ext': 'mp4', 'width': 854, 'height': 480, 'acodec': 'aac', 'abr': 128, 'vcodec': 'h264'},

        # 3D videos        '82': {'ext': 'mp4', 'height': 360, 'format_note': '3D', 'acodec': 'aac', 'abr': 128, 'vcodec': 'h264', 'preference': -20},        '83': {'ext': 'mp4', 'height': 480, 'format_note': '3D', 'acodec': 'aac', 'abr': 128, 'vcodec': 'h264', 'preference': -20},        '84': {'ext': 'mp4', 'height': 720, 'format_note': '3D', 'acodec': 'aac', 'abr': 192, 'vcodec': 'h264', 'preference': -20},        '85': {'ext': 'mp4', 'height': 1080, 'format_note': '3D', 'acodec': 'aac', 'abr': 192, 'vcodec': 'h264', 'preference': -20},        '100': {'ext': 'webm', 'height': 360, 'format_note': '3D', 'acodec': 'vorbis', 'abr': 128, 'vcodec': 'vp8', 'preference': -20},        '101': {'ext': 'webm', 'height': 480, 'format_note': '3D', 'acodec': 'vorbis', 'abr': 192, 'vcodec': 'vp8', 'preference': -20},        '102': {'ext': 'webm', 'height': 720, 'format_note': '3D', 'acodec': 'vorbis', 'abr': 192, 'vcodec': 'vp8', 'preference': -20},
        # Apple HTTP Live Streaming        '91': {'ext': 'mp4', 'height': 144, 'format_note': 'HLS', 'acodec': 'aac', 'abr': 48, 'vcodec': 'h264', 'preference': -10},        '92': {'ext': 'mp4', 'height': 240, 'format_note': 'HLS', 'acodec': 'aac', 'abr': 48, 'vcodec': 'h264', 'preference': -10},        '93': {'ext': 'mp4', 'height': 360, 'format_note': 'HLS', 'acodec': 'aac', 'abr': 128, 'vcodec': 'h264', 'preference': -10},        '94': {'ext': 'mp4', 'height': 480, 'format_note': 'HLS', 'acodec': 'aac', 'abr': 128, 'vcodec': 'h264', 'preference': -10},        '95': {'ext': 'mp4', 'height': 720, 'format_note': 'HLS', 'acodec': 'aac', 'abr': 256, 'vcodec': 'h264', 'preference': -10},        '96': {'ext': 'mp4', 'height': 1080, 'format_note': 'HLS', 'acodec': 'aac', 'abr': 256, 'vcodec': 'h264', 'preference': -10},        '132': {'ext': 'mp4', 'height': 240, 'format_note': 'HLS', 'acodec': 'aac', 'abr': 48, 'vcodec': 'h264', 'preference': -10},        '151': {'ext': 'mp4', 'height': 72, 'format_note': 'HLS', 'acodec': 'aac', 'abr': 24, 'vcodec': 'h264', 'preference': -10},
        # DASH mp4 video        '133': {'ext': 'mp4', 'height': 240, 'format_note': 'DASH video', 'vcodec': 'h264'},        '134': {'ext': 'mp4', 'height': 360, 'format_note': 'DASH video', 'vcodec': 'h264'},        '135': {'ext': 'mp4', 'height': 480, 'format_note': 'DASH video', 'vcodec': 'h264'},        '136': {'ext': 'mp4', 'height': 720, 'format_note': 'DASH video', 'vcodec': 'h264'},        '137': {'ext': 'mp4', 'height': 1080, 'format_note': 'DASH video', 'vcodec': 'h264'},        '138': {'ext': 'mp4', 'format_note': 'DASH video', 'vcodec': 'h264'},  # Height can vary (https://github.com/rg3/youtube-dl/issues/4559)        '160': {'ext': 'mp4', 'height': 144, 'format_note': 'DASH video', 'vcodec': 'h264'},        '212': {'ext': 'mp4', 'height': 480, 'format_note': 'DASH video', 'vcodec': 'h264'},        '264': {'ext': 'mp4', 'height': 1440, 'format_note': 'DASH video', 'vcodec': 'h264'},        '298': {'ext': 'mp4', 'height': 720, 'format_note': 'DASH video', 'vcodec': 'h264', 'fps': 60},        '299': {'ext': 'mp4', 'height': 1080, 'format_note': 'DASH video', 'vcodec': 'h264', 'fps': 60},        '266': {'ext': 'mp4', 'height': 2160, 'format_note': 'DASH video', 'vcodec': 'h264'},
        # Dash mp4 audio        '139': {'ext': 'm4a', 'format_note': 'DASH audio', 'acodec': 'aac', 'abr': 48, 'container': 'm4a_dash'},        '140': {'ext': 'm4a', 'format_note': 'DASH audio', 'acodec': 'aac', 'abr': 128, 'container': 'm4a_dash'},        '141': {'ext': 'm4a', 'format_note': 'DASH audio', 'acodec': 'aac', 'abr': 256, 'container': 'm4a_dash'},        '256': {'ext': 'm4a', 'format_note': 'DASH audio', 'acodec': 'aac', 'container': 'm4a_dash'},        '258': {'ext': 'm4a', 'format_note': 'DASH audio', 'acodec': 'aac', 'container': 'm4a_dash'},        '325': {'ext': 'm4a', 'format_note': 'DASH audio', 'acodec': 'dtse', 'container': 'm4a_dash'},        '328': {'ext': 'm4a', 'format_note': 'DASH audio', 'acodec': 'ec-3', 'container': 'm4a_dash'},
        # Dash webm        '167': {'ext': 'webm', 'height': 360, 'width': 640, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'vp8'},        '168': {'ext': 'webm', 'height': 480, 'width': 854, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'vp8'},        '169': {'ext': 'webm', 'height': 720, 'width': 1280, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'vp8'},        '170': {'ext': 'webm', 'height': 1080, 'width': 1920, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'vp8'},        '218': {'ext': 'webm', 'height': 480, 'width': 854, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'vp8'},        '219': {'ext': 'webm', 'height': 480, 'width': 854, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'vp8'},        '278': {'ext': 'webm', 'height': 144, 'format_note': 'DASH video', 'container': 'webm', 'vcodec': 'vp9'},        '242': {'ext': 'webm', 'height': 240, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '243': {'ext': 'webm', 'height': 360, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '244': {'ext': 'webm', 'height': 480, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '245': {'ext': 'webm', 'height': 480, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '246': {'ext': 'webm', 'height': 480, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '247': {'ext': 'webm', 'height': 720, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '248': {'ext': 'webm', 'height': 1080, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '271': {'ext': 'webm', 'height': 1440, 'format_note': 'DASH video', 'vcodec': 'vp9'},        # itag 272 videos are either 3840x2160 (e.g. RtoitU2A-3E) or 7680x4320 (sLprVF6d7Ug)        '272': {'ext': 'webm', 'height': 2160, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '302': {'ext': 'webm', 'height': 720, 'format_note': 'DASH video', 'vcodec': 'vp9', 'fps': 60},        '303': {'ext': 'webm', 'height': 1080, 'format_note': 'DASH video', 'vcodec': 'vp9', 'fps': 60},        '308': {'ext': 'webm', 'height': 1440, 'format_note': 'DASH video', 'vcodec': 'vp9', 'fps': 60},        '313': {'ext': 'webm', 'height': 2160, 'format_note': 'DASH video', 'vcodec': 'vp9'},        '315': {'ext': 'webm', 'height': 2160, 'format_note': 'DASH video', 'vcodec': 'vp9', 'fps': 60},
        # Dash webm audio        '171': {'ext': 'webm', 'acodec': 'vorbis', 'format_note': 'DASH audio', 'abr': 128},        '172': {'ext': 'webm', 'acodec': 'vorbis', 'format_note': 'DASH audio', 'abr': 256},
        # Dash webm audio with opus inside        '249': {'ext': 'webm', 'format_note': 'DASH audio', 'acodec': 'opus', 'abr': 50},        '250': {'ext': 'webm', 'format_note': 'DASH audio', 'acodec': 'opus', 'abr': 70},        '251': {'ext': 'webm', 'format_note': 'DASH audio', 'acodec': 'opus', 'abr': 160},
        # RTMP (unnamed)        '_rtmp': {'protocol': 'rtmp'},    }    _SUBTITLE_FORMATS = ('ttml', 'vtt')
    _GEO_BYPASS = False
    IE_NAME = 'youtube'    _TESTS = [        {            'url': 'https://www.youtube.com/watch?v=BaW_jenozKc&t=1s&end=9',            'info_dict': {                'id': 'BaW_jenozKc',                'ext': 'mp4',                'title': 'youtube-dl test video "\'/\\ä↭𝕐',                'uploader': 'Philipp Hagemeister',                'uploader_id': 'phihag',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/phihag',                'upload_date': '20121002',                'license': 'Standard YouTube License',                'description': 'test chars:  "\'/\\ä↭𝕐\ntest URL: https://github.com/rg3/youtube-dl/issues/1892\n\nThis is a test video for youtube-dl.\n\nFor more information, contact phihag@phihag.de .',                'categories': ['Science & Technology'],                'tags': ['youtube-dl'],                'duration': 10,                'like_count': int,                'dislike_count': int,                'start_time': 1,                'end_time': 9,            }        },        {            'url': 'https://www.youtube.com/watch?v=UxxajLWwzqY',            'note': 'Test generic use_cipher_signature video (#897)',            'info_dict': {                'id': 'UxxajLWwzqY',                'ext': 'mp4',                'upload_date': '20120506',                'title': 'Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO]',                'alt_title': 'I Love It (feat. Charli XCX)',                'description': 'md5:f3ceb5ef83a08d95b9d146f973157cc8',                'tags': ['Icona Pop i love it', 'sweden', 'pop music', 'big beat records', 'big beat', 'charli',                         'xcx', 'charli xcx', 'girls', 'hbo', 'i love it', "i don't care", 'icona', 'pop',                         'iconic ep', 'iconic', 'love', 'it'],                'duration': 180,                'uploader': 'Icona Pop',                'uploader_id': 'IconaPop',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/IconaPop',                'license': 'Standard YouTube License',                'creator': 'Icona Pop',            }        },        {            'url': 'https://www.youtube.com/watch?v=07FYdnEawAQ',            'note': 'Test VEVO video with age protection (#956)',            'info_dict': {                'id': '07FYdnEawAQ',                'ext': 'mp4',                'upload_date': '20130703',                'title': 'Justin Timberlake - Tunnel Vision (Explicit)',                'alt_title': 'Tunnel Vision',                'description': 'md5:64249768eec3bc4276236606ea996373',                'duration': 419,                'uploader': 'justintimberlakeVEVO',                'uploader_id': 'justintimberlakeVEVO',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/justintimberlakeVEVO',                'license': 'Standard YouTube License',                'creator': 'Justin Timberlake',                'age_limit': 18,            }        },        {            'url': '//www.YouTube.com/watch?v=yZIXLfi8CZQ',            'note': 'Embed-only video (#1746)',            'info_dict': {                'id': 'yZIXLfi8CZQ',                'ext': 'mp4',                'upload_date': '20120608',                'title': 'Principal Sexually Assaults A Teacher - Episode 117 - 8th June 2012',                'description': 'md5:09b78bd971f1e3e289601dfba15ca4f7',                'uploader': 'SET India',                'uploader_id': 'setindia',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/setindia',                'license': 'Standard YouTube License',                'age_limit': 18,            }        },        {            'url': 'https://www.youtube.com/watch?v=BaW_jenozKc&v=UxxajLWwzqY',            'note': 'Use the first video ID in the URL',            'info_dict': {                'id': 'BaW_jenozKc',                'ext': 'mp4',                'title': 'youtube-dl test video "\'/\\ä↭𝕐',                'uploader': 'Philipp Hagemeister',                'uploader_id': 'phihag',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/phihag',                'upload_date': '20121002',                'license': 'Standard YouTube License',                'description': 'test chars:  "\'/\\ä↭𝕐\ntest URL: https://github.com/rg3/youtube-dl/issues/1892\n\nThis is a test video for youtube-dl.\n\nFor more information, contact phihag@phihag.de .',                'categories': ['Science & Technology'],                'tags': ['youtube-dl'],                'duration': 10,                'like_count': int,                'dislike_count': int,            },            'params': {                'skip_download': True,            },        },        {            'url': 'https://www.youtube.com/watch?v=a9LDPn-MO4I',            'note': '256k DASH audio (format 141) via DASH manifest',            'info_dict': {                'id': 'a9LDPn-MO4I',                'ext': 'm4a',                'upload_date': '20121002',                'uploader_id': '8KVIDEO',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/8KVIDEO',                'description': '',                'uploader': '8KVIDEO',                'license': 'Standard YouTube License',                'title': 'UHDTV TEST 8K VIDEO.mp4'            },            'params': {                'youtube_include_dash_manifest': True,                'format': '141',            },            'skip': 'format 141 not served anymore',        },        # DASH manifest with encrypted signature        {            'url': 'https://www.youtube.com/watch?v=IB3lcPjvWLA',            'info_dict': {                'id': 'IB3lcPjvWLA',                'ext': 'm4a',                'title': 'Afrojack, Spree Wilson - The Spark ft. Spree Wilson',                'description': 'md5:12e7067fa6735a77bdcbb58cb1187d2d',                'duration': 244,                'uploader': 'AfrojackVEVO',                'uploader_id': 'AfrojackVEVO',                'upload_date': '20131011',                'license': 'Standard YouTube License',            },            'params': {                'youtube_include_dash_manifest': True,                'format': '141/bestaudio[ext=m4a]',            },        },        # JS player signature function name containing $        {            'url': 'https://www.youtube.com/watch?v=nfWlot6h_JM',            'info_dict': {                'id': 'nfWlot6h_JM',                'ext': 'm4a',                'title': 'Taylor Swift - Shake It Off',                'alt_title': 'Shake It Off',                'description': 'md5:95f66187cd7c8b2c13eb78e1223b63c3',                'duration': 242,                'uploader': 'TaylorSwiftVEVO',                'uploader_id': 'TaylorSwiftVEVO',                'upload_date': '20140818',                'license': 'Standard YouTube License',                'creator': 'Taylor Swift',            },            'params': {                'youtube_include_dash_manifest': True,                'format': '141/bestaudio[ext=m4a]',            },        },        # Controversy video        {            'url': 'https://www.youtube.com/watch?v=T4XJQO3qol8',            'info_dict': {                'id': 'T4XJQO3qol8',                'ext': 'mp4',                'duration': 219,                'upload_date': '20100909',                'uploader': 'The Amazing Atheist',                'uploader_id': 'TheAmazingAtheist',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/TheAmazingAtheist',                'license': 'Standard YouTube License',                'title': 'Burning Everyone\'s Koran',                'description': 'SUBSCRIBE: http://www.youtube.com/saturninefilms\n\nEven Obama has taken a stand against freedom on this issue: http://www.huffingtonpost.com/2010/09/09/obama-gma-interview-quran_n_710282.html',            }        },        # Normal age-gate video (No vevo, embed allowed)        {            'url': 'https://youtube.com/watch?v=HtVdAasjOgU',            'info_dict': {                'id': 'HtVdAasjOgU',                'ext': 'mp4',                'title': 'The Witcher 3: Wild Hunt - The Sword Of Destiny Trailer',                'description': r're:(?s).{100,}About the Game\n.*?The Witcher 3: Wild Hunt.{100,}',                'duration': 142,                'uploader': 'The Witcher',                'uploader_id': 'WitcherGame',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/WitcherGame',                'upload_date': '20140605',                'license': 'Standard YouTube License',                'age_limit': 18,            },        },        # Age-gate video with encrypted signature        {            'url': 'https://www.youtube.com/watch?v=6kLq3WMV1nU',            'info_dict': {                'id': '6kLq3WMV1nU',                'ext': 'mp4',                'title': 'Dedication To My Ex (Miss That) (Lyric Video)',                'description': 'md5:33765bb339e1b47e7e72b5490139bb41',                'duration': 247,                'uploader': 'LloydVEVO',                'uploader_id': 'LloydVEVO',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/LloydVEVO',                'upload_date': '20110629',                'license': 'Standard YouTube License',                'age_limit': 18,            },        },        # video_info is None (https://github.com/rg3/youtube-dl/issues/4421)        # YouTube Red ad is not captured for creator        {            'url': '__2ABJjxzNo',            'info_dict': {                'id': '__2ABJjxzNo',                'ext': 'mp4',                'duration': 266,                'upload_date': '20100430',                'uploader_id': 'deadmau5',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/deadmau5',                'creator': 'deadmau5',                'description': 'md5:12c56784b8032162bb936a5f76d55360',                'uploader': 'deadmau5',                'license': 'Standard YouTube License',                'title': 'Deadmau5 - Some Chords (HD)',                'alt_title': 'Some Chords',            },            'expected_warnings': [                'DASH manifest missing',            ]        },        # Olympics (https://github.com/rg3/youtube-dl/issues/4431)        {            'url': 'lqQg6PlCWgI',            'info_dict': {                'id': 'lqQg6PlCWgI',                'ext': 'mp4',                'duration': 6085,                'upload_date': '20150827',                'uploader_id': 'olympic',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/olympic',                'license': 'Standard YouTube License',                'description': 'HO09  - Women -  GER-AUS - Hockey - 31 July 2012 - London 2012 Olympic Games',                'uploader': 'Olympic',                'title': 'Hockey - Women -  GER-AUS - London 2012 Olympic Games',            },            'params': {                'skip_download': 'requires avconv',            }        },        # Non-square pixels        {            'url': 'https://www.youtube.com/watch?v=_b-2C3KPAM0',            'info_dict': {                'id': '_b-2C3KPAM0',                'ext': 'mp4',                'stretched_ratio': 16 / 9.,                'duration': 85,                'upload_date': '20110310',                'uploader_id': 'AllenMeow',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/AllenMeow',                'description': 'made by Wacom from Korea | 字幕&加油添醋 by TY\'s Allen | 感謝heylisa00cavey1001同學熱情提供梗及翻譯',                'uploader': '孫艾倫',                'license': 'Standard YouTube License',                'title': '[A-made] 變態妍字幕版 太妍 我就是這樣的人',            },        },        # url_encoded_fmt_stream_map is empty string        {            'url': 'qEJwOuvDf7I',            'info_dict': {                'id': 'qEJwOuvDf7I',                'ext': 'webm',                'title': 'Обсуждение судебной практики по выборам 14 сентября 2014 года в Санкт-Петербурге',                'description': '',                'upload_date': '20150404',                'uploader_id': 'spbelect',                'uploader': 'Наблюдатели Петербурга',            },            'params': {                'skip_download': 'requires avconv',            },            'skip': 'This live event has ended.',        },        # Extraction from multiple DASH manifests (https://github.com/rg3/youtube-dl/pull/6097)        {            'url': 'https://www.youtube.com/watch?v=FIl7x6_3R5Y',            'info_dict': {                'id': 'FIl7x6_3R5Y',                'ext': 'mp4',                'title': 'md5:7b81415841e02ecd4313668cde88737a',                'description': 'md5:116377fd2963b81ec4ce64b542173306',                'duration': 220,                'upload_date': '20150625',                'uploader_id': 'dorappi2000',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/dorappi2000',                'uploader': 'dorappi2000',                'license': 'Standard YouTube License',                'formats': 'mincount:32',            },        },        # DASH manifest with segment_list        {            'url': 'https://www.youtube.com/embed/CsmdDsKjzN8',            'md5': '8ce563a1d667b599d21064e982ab9e31',            'info_dict': {                'id': 'CsmdDsKjzN8',                'ext': 'mp4',                'upload_date': '20150501',  # According to '<meta itemprop="datePublished"', but in other places it's 20150510                'uploader': 'Airtek',                'description': 'Retransmisión en directo de la XVIII media maratón de Zaragoza.',                'uploader_id': 'UCzTzUmjXxxacNnL8I3m4LnQ',                'license': 'Standard YouTube License',                'title': 'Retransmisión XVIII Media maratón Zaragoza 2015',            },            'params': {                'youtube_include_dash_manifest': True,                'format': '135',  # bestvideo            },            'skip': 'This live event has ended.',        },        {            # Multifeed videos (multiple cameras), URL is for Main Camera            'url': 'https://www.youtube.com/watch?v=jqWvoWXjCVs',            'info_dict': {                'id': 'jqWvoWXjCVs',                'title': 'teamPGP: Rocket League Noob Stream',                'description': 'md5:dc7872fb300e143831327f1bae3af010',            },            'playlist': [{                'info_dict': {                    'id': 'jqWvoWXjCVs',                    'ext': 'mp4',                    'title': 'teamPGP: Rocket League Noob Stream (Main Camera)',                    'description': 'md5:dc7872fb300e143831327f1bae3af010',                    'duration': 7335,                    'upload_date': '20150721',                    'uploader': 'Beer Games Beer',                    'uploader_id': 'beergamesbeer',                    'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/beergamesbeer',                    'license': 'Standard YouTube License',                },            }, {                'info_dict': {                    'id': '6h8e8xoXJzg',                    'ext': 'mp4',                    'title': 'teamPGP: Rocket League Noob Stream (kreestuh)',                    'description': 'md5:dc7872fb300e143831327f1bae3af010',                    'duration': 7337,                    'upload_date': '20150721',                    'uploader': 'Beer Games Beer',                    'uploader_id': 'beergamesbeer',                    'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/beergamesbeer',                    'license': 'Standard YouTube License',                },            }, {                'info_dict': {                    'id': 'PUOgX5z9xZw',                    'ext': 'mp4',                    'title': 'teamPGP: Rocket League Noob Stream (grizzle)',                    'description': 'md5:dc7872fb300e143831327f1bae3af010',                    'duration': 7337,                    'upload_date': '20150721',                    'uploader': 'Beer Games Beer',                    'uploader_id': 'beergamesbeer',                    'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/beergamesbeer',                    'license': 'Standard YouTube License',                },            }, {                'info_dict': {                    'id': 'teuwxikvS5k',                    'ext': 'mp4',                    'title': 'teamPGP: Rocket League Noob Stream (zim)',                    'description': 'md5:dc7872fb300e143831327f1bae3af010',                    'duration': 7334,                    'upload_date': '20150721',                    'uploader': 'Beer Games Beer',                    'uploader_id': 'beergamesbeer',                    'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/beergamesbeer',                    'license': 'Standard YouTube License',                },            }],            'params': {                'skip_download': True,            },        },        {            # Multifeed video with comma in title (see https://github.com/rg3/youtube-dl/issues/8536)            'url': 'https://www.youtube.com/watch?v=gVfLd0zydlo',            'info_dict': {                'id': 'gVfLd0zydlo',                'title': 'DevConf.cz 2016 Day 2 Workshops 1 14:00 - 15:30',            },            'playlist_count': 2,            'skip': 'Not multifeed anymore',        },        {            'url': 'https://vid.plus/FlRa-iH7PGw',            'only_matching': True,        },        {            'url': 'https://zwearz.com/watch/9lWxNJF-ufM/electra-woman-dyna-girl-official-trailer-grace-helbig.html',            'only_matching': True,        },        {            # Title with JS-like syntax "};" (see https://github.com/rg3/youtube-dl/issues/7468)            # Also tests cut-off URL expansion in video description (see            # https://github.com/rg3/youtube-dl/issues/1892,            # https://github.com/rg3/youtube-dl/issues/8164)            'url': 'https://www.youtube.com/watch?v=lsguqyKfVQg',            'info_dict': {                'id': 'lsguqyKfVQg',                'ext': 'mp4',                'title': '{dark walk}; Loki/AC/Dishonored; collab w/Elflover21',                'alt_title': 'Dark Walk',                'description': 'md5:8085699c11dc3f597ce0410b0dcbb34a',                'duration': 133,                'upload_date': '20151119',                'uploader_id': 'IronSoulElf',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/IronSoulElf',                'uploader': 'IronSoulElf',                'license': 'Standard YouTube License',                'creator': 'Todd Haberman, Daniel Law Heath & Aaron Kaplan',            },            'params': {                'skip_download': True,            },        },        {            # Tags with '};' (see https://github.com/rg3/youtube-dl/issues/7468)            'url': 'https://www.youtube.com/watch?v=Ms7iBXnlUO8',            'only_matching': True,        },        {            # Video with yt:stretch=17:0            'url': 'https://www.youtube.com/watch?v=Q39EVAstoRM',            'info_dict': {                'id': 'Q39EVAstoRM',                'ext': 'mp4',                'title': 'Clash Of Clans#14 Dicas De Ataque Para CV 4',                'description': 'md5:ee18a25c350637c8faff806845bddee9',                'upload_date': '20151107',                'uploader_id': 'UCCr7TALkRbo3EtFzETQF1LA',                'uploader': 'CH GAMER DROID',            },            'params': {                'skip_download': True,            },            'skip': 'This video does not exist.',        },        {            # Video licensed under Creative Commons            'url': 'https://www.youtube.com/watch?v=M4gD1WSo5mA',            'info_dict': {                'id': 'M4gD1WSo5mA',                'ext': 'mp4',                'title': 'md5:e41008789470fc2533a3252216f1c1d1',                'description': 'md5:a677553cf0840649b731a3024aeff4cc',                'duration': 721,                'upload_date': '20150127',                'uploader_id': 'BerkmanCenter',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/BerkmanCenter',                'uploader': 'The Berkman Klein Center for Internet & Society',                'license': 'Creative Commons Attribution license (reuse allowed)',            },            'params': {                'skip_download': True,            },        },        {            # Channel-like uploader_url            'url': 'https://www.youtube.com/watch?v=eQcmzGIKrzg',            'info_dict': {                'id': 'eQcmzGIKrzg',                'ext': 'mp4',                'title': 'Democratic Socialism and Foreign Policy | Bernie Sanders',                'description': 'md5:dda0d780d5a6e120758d1711d062a867',                'duration': 4060,                'upload_date': '20151119',                'uploader': 'Bernie 2016',                'uploader_id': 'UCH1dpzjCEiGAt8CXkryhkZg',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/channel/UCH1dpzjCEiGAt8CXkryhkZg',                'license': 'Creative Commons Attribution license (reuse allowed)',            },            'params': {                'skip_download': True,            },        },        {            'url': 'https://www.youtube.com/watch?feature=player_embedded&amp;amp;v=V36LpHqtcDY',            'only_matching': True,        },        {            # YouTube Red paid video (https://github.com/rg3/youtube-dl/issues/10059)            'url': 'https://www.youtube.com/watch?v=i1Ko8UG-Tdo',            'only_matching': True,        },        {            # Rental video preview            'url': 'https://www.youtube.com/watch?v=yYr8q0y5Jfg',            'info_dict': {                'id': 'uGpuVWrhIzE',                'ext': 'mp4',                'title': 'Piku - Trailer',                'description': 'md5:c36bd60c3fd6f1954086c083c72092eb',                'upload_date': '20150811',                'uploader': 'FlixMatrix',                'uploader_id': 'FlixMatrixKaravan',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/FlixMatrixKaravan',                'license': 'Standard YouTube License',            },            'params': {                'skip_download': True,            },        },        {            # YouTube Red video with episode data            'url': 'https://www.youtube.com/watch?v=iqKdEhx-dD4',            'info_dict': {                'id': 'iqKdEhx-dD4',                'ext': 'mp4',                'title': 'Isolation - Mind Field (Ep 1)',                'description': 'md5:8013b7ddea787342608f63a13ddc9492',                'duration': 2085,                'upload_date': '20170118',                'uploader': 'Vsauce',                'uploader_id': 'Vsauce',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/Vsauce',                'license': 'Standard YouTube License',                'series': 'Mind Field',                'season_number': 1,                'episode_number': 1,            },            'params': {                'skip_download': True,            },            'expected_warnings': [                'Skipping DASH manifest',            ],        },        {            # The following content has been identified by the YouTube community            # as inappropriate or offensive to some audiences.            'url': 'https://www.youtube.com/watch?v=6SJNVb0GnPI',            'info_dict': {                'id': '6SJNVb0GnPI',                'ext': 'mp4',                'title': 'Race Differences in Intelligence',                'description': 'md5:5d161533167390427a1f8ee89a1fc6f1',                'duration': 965,                'upload_date': '20140124',                'uploader': 'New Century Foundation',                'uploader_id': 'UCEJYpZGqgUob0zVVEaLhvVg',                'uploader_url': r're:https?://(?:www\.)?youtube\.com/channel/UCEJYpZGqgUob0zVVEaLhvVg',                'license': 'Standard YouTube License',                'view_count': int,            },            'params': {                'skip_download': True,            },        },        {            # itag 212            'url': '1t24XAntNCY',            'only_matching': True,        },        {            # geo restricted to JP            'url': 'sJL6WA-aGkQ',            'only_matching': True,        },        {            'url': 'https://www.youtube.com/watch?v=MuAGGZNfUkU&list=RDMM',            'only_matching': True,        },    ]
    def __init__(self, *args, **kwargs):        super(YoutubeIE, self).__init__(*args, **kwargs)        self._player_cache = {}
    def report_video_info_webpage_download(self, video_id):        """Report attempt to download video info webpage."""        self.to_screen('%s: Downloading video info webpage' % video_id)
    def report_information_extraction(self, video_id):        """Report attempt to extract video information."""        self.to_screen('%s: Extracting video information' % video_id)
    def report_unavailable_format(self, video_id, format):        """Report extracted video URL."""        self.to_screen('%s: Format %s not available' % (video_id, format))
    def report_rtmp_download(self):        """Indicate the download will use the RTMP protocol."""        self.to_screen('RTMP download detected')
    def _signature_cache_id(self, example_sig):        """ Return a string representation of a signature """        return '.'.join(compat_str(len(part)) for part in example_sig.split('.'))
    def _extract_signature_function(self, video_id, player_url, example_sig):        id_m = re.match(            r'.*?-(?P<id>[a-zA-Z0-9_-]+)(?:/watch_as3|/html5player(?:-new)?|(?:/[a-z]{2}_[A-Z]{2})?/base)?\.(?P<ext>[a-z]+)$',            player_url)        if not id_m:            raise ExtractorError('Cannot identify player %r' % player_url)        player_type = id_m.group('ext')        player_id = id_m.group('id')
        # Read from filesystem cache        func_id = '%s_%s_%s' % (            player_type, player_id, self._signature_cache_id(example_sig))        assert os.path.basename(func_id) == func_id
        cache_spec = self._downloader.cache.load('youtube-sigfuncs', func_id)        if cache_spec is not None:            return lambda s: ''.join(s[i] for i in cache_spec)
        download_note = (            'Downloading player %s' % player_url            if self._downloader.params.get('verbose') else            'Downloading %s player %s' % (player_type, player_id)        )        if player_type == 'js':            code = self._download_webpage(                player_url, video_id,                note=download_note,                errnote='Download of %s failed' % player_url)            res = self._parse_sig_js(code)        elif player_type == 'swf':            urlh = self._request_webpage(                player_url, video_id,                note=download_note,                errnote='Download of %s failed' % player_url)            code = urlh.read()            res = self._parse_sig_swf(code)        else:            assert False, 'Invalid player type %r' % player_type
        test_string = ''.join(map(compat_chr, range(len(example_sig))))        cache_res = res(test_string)        cache_spec = [ord(c) for c in cache_res]
        self._downloader.cache.store('youtube-sigfuncs', func_id, cache_spec)        return res
    def _print_sig_code(self, func, example_sig):        def gen_sig_code(idxs):            def _genslice(start, end, step):                starts = '' if start == 0 else str(start)                ends = (':%d' % (end + step)) if end + step >= 0 else ':'                steps = '' if step == 1 else (':%d' % step)                return 's[%s%s%s]' % (starts, ends, steps)
            step = None            # Quelch pyflakes warnings - start will be set when step is set            start = '(Never used)'            for i, prev in zip(idxs[1:], idxs[:-1]):                if step is not None:                    if i - prev == step:                        continue                    yield _genslice(start, prev, step)                    step = None                    continue                if i - prev in [-1, 1]:                    step = i - prev                    start = prev                    continue                else:                    yield 's[%d]' % prev            if step is None:                yield 's[%d]' % i            else:                yield _genslice(start, i, step)
        test_string = ''.join(map(compat_chr, range(len(example_sig))))        cache_res = func(test_string)        cache_spec = [ord(c) for c in cache_res]        expr_code = ' + '.join(gen_sig_code(cache_spec))        signature_id_tuple = '(%s)' % (            ', '.join(compat_str(len(p)) for p in example_sig.split('.')))        code = ('if tuple(len(p) for p in s.split(\'.\')) == %s:\n'                '    return %s\n') % (signature_id_tuple, expr_code)        self.to_screen('Extracted signature function:\n' + code)
    def _parse_sig_js(self, jscode):        funcname = self._search_regex(            (r'(["\'])signature\1\s*,\s*(?P<sig>[a-zA-Z0-9$]+)\(',             r'\.sig\|\|(?P<sig>[a-zA-Z0-9$]+)\('),            jscode, 'Initial JS player signature function name', group='sig')
        jsi = JSInterpreter(jscode)        initial_function = jsi.extract_function(funcname)        return lambda s: initial_function([s])
    def _parse_sig_swf(self, file_contents):        swfi = SWFInterpreter(file_contents)        TARGET_CLASSNAME = 'SignatureDecipher'        searched_class = swfi.extract_class(TARGET_CLASSNAME)        initial_function = swfi.extract_function(searched_class, 'decipher')        return lambda s: initial_function([s])
    def _decrypt_signature(self, s, video_id, player_url, age_gate=False):        """Turn the encrypted s field into a working signature"""
        if player_url is None:            raise ExtractorError('Cannot decrypt signature without player_url')
        if player_url.startswith('//'):            player_url = 'https:' + player_url        elif not re.match(r'https?://', player_url):            player_url = compat_urlparse.urljoin(                'https://www.youtube.com', player_url)        try:            player_id = (player_url, self._signature_cache_id(s))            if player_id not in self._player_cache:                func = self._extract_signature_function(                    video_id, player_url, s                )                self._player_cache[player_id] = func            func = self._player_cache[player_id]            if self._downloader.params.get('youtube_print_sig_code'):                self._print_sig_code(func, s)            return func(s)        except Exception as e:            tb = traceback.format_exc()            raise ExtractorError(                'Signature extraction failed: ' + tb, cause=e)
    def _get_subtitles(self, video_id, webpage):        try:            subs_doc = self._download_xml(                'https://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id,                video_id, note=False)        except ExtractorError as err:            self._downloader.report_warning('unable to download video subtitles: %s' % error_to_compat_str(err))            return {}
        sub_lang_list = {}        for track in subs_doc.findall('track'):            lang = track.attrib['lang_code']            if lang in sub_lang_list:                continue            sub_formats = []            for ext in self._SUBTITLE_FORMATS:                params = compat_urllib_parse_urlencode({                    'lang': lang,                    'v': video_id,                    'fmt': ext,                    'name': track.attrib['name'].encode('utf-8'),                })                sub_formats.append({                    'url': 'https://www.youtube.com/api/timedtext?' + params,                    'ext': ext,                })            sub_lang_list[lang] = sub_formats        if not sub_lang_list:            self._downloader.report_warning('video doesn\'t have subtitles')            return {}        return sub_lang_list
    def _get_ytplayer_config(self, video_id, webpage):        patterns = (            # User data may contain arbitrary character sequences that may affect            # JSON extraction with regex, e.g. when '};' is contained the second            # regex won't capture the whole JSON. Yet working around by trying more            # concrete regex first keeping in mind proper quoted string handling            # to be implemented in future that will replace this workaround (see            # https://github.com/rg3/youtube-dl/issues/7468,            # https://github.com/rg3/youtube-dl/pull/7599)            r';ytplayer\.config\s*=\s*({.+?});ytplayer',            r';ytplayer\.config\s*=\s*({.+?});',        )        config = self._search_regex(            patterns, webpage, 'ytplayer.config', default=None)        if config:            return self._parse_json(                uppercase_escape(config), video_id, fatal=False)
    def _get_automatic_captions(self, video_id, webpage):        """We need the webpage for getting the captions url, pass it as an
           argument to speed up the process."""
        self.to_screen('%s: Looking for automatic captions' % video_id)        player_config = self._get_ytplayer_config(video_id, webpage)        err_msg = 'Couldn\'t find automatic captions for %s' % video_id        if not player_config:            self._downloader.report_warning(err_msg)            return {}        try:            args = player_config['args']            caption_url = args.get('ttsurl')            if caption_url:                timestamp = args['timestamp']                # We get the available subtitles                list_params = compat_urllib_parse_urlencode({                    'type': 'list',                    'tlangs': 1,                    'asrs': 1,                })                list_url = caption_url + '&' + list_params                caption_list = self._download_xml(list_url, video_id)                original_lang_node = caption_list.find('track')                if original_lang_node is None:                    self._downloader.report_warning('Video doesn\'t have automatic captions')                    return {}                original_lang = original_lang_node.attrib['lang_code']                caption_kind = original_lang_node.attrib.get('kind', '')
                sub_lang_list = {}                for lang_node in caption_list.findall('target'):                    sub_lang = lang_node.attrib['lang_code']                    sub_formats = []                    for ext in self._SUBTITLE_FORMATS:                        params = compat_urllib_parse_urlencode({                            'lang': original_lang,                            'tlang': sub_lang,                            'fmt': ext,                            'ts': timestamp,                            'kind': caption_kind,                        })                        sub_formats.append({                            'url': caption_url + '&' + params,                            'ext': ext,                        })                    sub_lang_list[sub_lang] = sub_formats                return sub_lang_list
            def make_captions(sub_url, sub_langs):                parsed_sub_url = compat_urllib_parse_urlparse(sub_url)                caption_qs = compat_parse_qs(parsed_sub_url.query)                captions = {}                for sub_lang in sub_langs:                    sub_formats = []                    for ext in self._SUBTITLE_FORMATS:                        caption_qs.update({                            'tlang': [sub_lang],                            'fmt': [ext],                        })                        sub_url = compat_urlparse.urlunparse(parsed_sub_url._replace(                            query=compat_urllib_parse_urlencode(caption_qs, True)))                        sub_formats.append({                            'url': sub_url,                            'ext': ext,                        })                    captions[sub_lang] = sub_formats                return captions
            # New captions format as of 22.06.2017            player_response = args.get('player_response')            if player_response and isinstance(player_response, compat_str):                player_response = self._parse_json(                    player_response, video_id, fatal=False)                if player_response:                    renderer = player_response['captions']['playerCaptionsTracklistRenderer']                    base_url = renderer['captionTracks'][0]['baseUrl']                    sub_lang_list = []                    for lang in renderer['translationLanguages']:                        lang_code = lang.get('languageCode')                        if lang_code:                            sub_lang_list.append(lang_code)                    return make_captions(base_url, sub_lang_list)
            # Some videos don't provide ttsurl but rather caption_tracks and            # caption_translation_languages (e.g. 20LmZk1hakA)            # Does not used anymore as of 22.06.2017            caption_tracks = args['caption_tracks']            caption_translation_languages = args['caption_translation_languages']            caption_url = compat_parse_qs(caption_tracks.split(',')[0])['u'][0]            sub_lang_list = []            for lang in caption_translation_languages.split(','):                lang_qs = compat_parse_qs(compat_urllib_parse_unquote_plus(lang))                sub_lang = lang_qs.get('lc', [None])[0]                if sub_lang:                    sub_lang_list.append(sub_lang)            return make_captions(caption_url, sub_lang_list)        # An extractor error can be raise by the download process if there are        # no automatic captions but there are subtitles        except (KeyError, IndexError, ExtractorError):            self._downloader.report_warning(err_msg)            return {}
    def _mark_watched(self, video_id, video_info):        playback_url = video_info.get('videostats_playback_base_url', [None])[0]        if not playback_url:            return        parsed_playback_url = compat_urlparse.urlparse(playback_url)        qs = compat_urlparse.parse_qs(parsed_playback_url.query)
        # cpn generation algorithm is reverse engineered from base.js.        # In fact it works even with dummy cpn.        CPN_ALPHABET = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_'        cpn = ''.join((CPN_ALPHABET[random.randint(0, 256) & 63] for _ in range(0, 16)))
        qs.update({            'ver': ['2'],            'cpn': [cpn],        })        playback_url = compat_urlparse.urlunparse(            parsed_playback_url._replace(query=compat_urllib_parse_urlencode(qs, True)))
        self._download_webpage(            playback_url, video_id, 'Marking watched',            'Unable to mark watched', fatal=False)
    @staticmethod    def _extract_urls(webpage):        # Embedded YouTube player        entries = [            unescapeHTML(mobj.group('url'))            for mobj in re.finditer(r'''(?x)
            (?:                <iframe[^>]+?src=|                data-video-url=|                <embed[^>]+?src=|                embedSWF\(?:\s*|                <object[^>]+data=|                new\s+SWFObject\(            )            (["\'])                (?P<url>(?:https?:)?//(?:www\.)?youtube(?:-nocookie)?\.com/                (?:embed|v|p)/[0-9A-Za-z_-]{11}.*?)            \1''', webpage)]

        # lazyYT YouTube embed        entries.extend(list(map(            unescapeHTML,            re.findall(r'class="lazyYT" data-youtube-id="([^"]+)"', webpage))))
        # Wordpress "YouTube Video Importer" plugin        matches = re.findall(r'''(?x)<div[^>]+
            class=(?P<q1>[\'"])[^\'"]*\byvii_single_video_player\b[^\'"]*(?P=q1)[^>]+            data-video_id=(?P<q2>[\'"])([^\'"]+)(?P=q2)''', webpage)        entries.extend(m[-1] for m in matches)
        return entries
    @staticmethod    def _extract_url(webpage):        urls = YoutubeIE._extract_urls(webpage)        return urls[0] if urls else None
    @classmethod    def extract_id(cls, url):        mobj = re.match(cls._VALID_URL, url, re.VERBOSE)        if mobj is None:            raise ExtractorError('Invalid URL: %s' % url)        video_id = mobj.group(2)        return video_id
    def _extract_annotations(self, video_id):        url = 'https://www.youtube.com/annotations_invideo?features=1&legacy=1&video_id=%s' % video_id        return self._download_webpage(url, video_id, note='Searching for annotations.', errnote='Unable to download video annotations.')
    @staticmethod    def _extract_chapters(description, duration):        if not description:            return None        chapter_lines = re.findall(            r'(?:^|<br\s*/>)([^<]*<a[^>]+onclick=["\']yt\.www\.watch\.player\.seekTo[^>]+>(\d{1,2}:\d{1,2}(?::\d{1,2})?)</a>[^>]*)(?=$|<br\s*/>)',            description)        if not chapter_lines:            return None        chapters = []        for next_num, (chapter_line, time_point) in enumerate(                chapter_lines, start=1):            start_time = parse_duration(time_point)            if start_time is None:                continue            if start_time > duration:                break            end_time = (duration if next_num == len(chapter_lines)                        else parse_duration(chapter_lines[next_num][1]))            if end_time is None:                continue            if end_time > duration:                end_time = duration            if start_time > end_time:                break            chapter_title = re.sub(                r'<a[^>]+>[^<]+</a>', '', chapter_line).strip(' \t-')            chapter_title = re.sub(r'\s+', ' ', chapter_title)            chapters.append({                'start_time': start_time,                'end_time': end_time,                'title': chapter_title,            })        return chapters
    def _real_extract(self, url):        url, smuggled_data = unsmuggle_url(url, {})
        proto = (            'http' if self._downloader.params.get('prefer_insecure', False)            else 'https')
        start_time = None        end_time = None        parsed_url = compat_urllib_parse_urlparse(url)        for component in [parsed_url.fragment, parsed_url.query]:            query = compat_parse_qs(component)            if start_time is None and 't' in query:                start_time = parse_duration(query['t'][0])            if start_time is None and 'start' in query:                start_time = parse_duration(query['start'][0])            if end_time is None and 'end' in query:                end_time = parse_duration(query['end'][0])
        # Extract original video URL from URL with redirection, like age verification, using next_url parameter        mobj = re.search(self._NEXT_URL_RE, url)        if mobj:            url = proto + '://www.youtube.com/' + compat_urllib_parse_unquote(mobj.group(1)).lstrip('/')        video_id = self.extract_id(url)
        # Get video webpage        url = proto + '://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1&bpctr=9999999999' % video_id        video_webpage = self._download_webpage(url, video_id)
        # Attempt to extract SWF player URL        mobj = re.search(r'swfConfig.*?"(https?:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)        if mobj is not None:            player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))        else:            player_url = None
        dash_mpds = []
        def add_dash_mpd(video_info):            dash_mpd = video_info.get('dashmpd')            if dash_mpd and dash_mpd[0] not in dash_mpds:                dash_mpds.append(dash_mpd[0])
        is_live = None        view_count = None
        def extract_view_count(v_info):            return int_or_none(try_get(v_info, lambda x: x['view_count'][0]))
        # Get video info        embed_webpage = None        if re.search(r'player-age-gate-content">', video_webpage) is not None:            age_gate = True            # We simulate the access to the video from www.youtube.com/v/{video_id}            # this can be viewed without login into Youtube            url = proto + '://www.youtube.com/embed/%s' % video_id            embed_webpage = self._download_webpage(url, video_id, 'Downloading embed webpage')            data = compat_urllib_parse_urlencode({                'video_id': video_id,                'eurl': 'https://youtube.googleapis.com/v/' + video_id,                'sts': self._search_regex(                    r'"sts"\s*:\s*(\d+)', embed_webpage, 'sts', default=''),            })            video_info_url = proto + '://www.youtube.com/get_video_info?' + data            video_info_webpage = self._download_webpage(                video_info_url, video_id,                note='Refetching age-gated info webpage',                errnote='unable to download video info webpage')            video_info = compat_parse_qs(video_info_webpage)            add_dash_mpd(video_info)        else:            age_gate = False            video_info = None            sts = None            # Try looking directly into the video webpage            ytplayer_config = self._get_ytplayer_config(video_id, video_webpage)            if ytplayer_config:                args = ytplayer_config['args']                if args.get('url_encoded_fmt_stream_map'):                    # Convert to the same format returned by compat_parse_qs                    video_info = dict((k, [v]) for k, v in args.items())                    add_dash_mpd(video_info)                # Rental video is not rented but preview is available (e.g.                # https://www.youtube.com/watch?v=yYr8q0y5Jfg,                # https://github.com/rg3/youtube-dl/issues/10532)                if not video_info and args.get('ypc_vid'):                    return self.url_result(                        args['ypc_vid'], YoutubeIE.ie_key(), video_id=args['ypc_vid'])                if args.get('livestream') == '1' or args.get('live_playback') == 1:                    is_live = True                sts = ytplayer_config.get('sts')            if not video_info or self._downloader.params.get('youtube_include_dash_manifest', True):                # We also try looking in get_video_info since it may contain different dashmpd                # URL that points to a DASH manifest with possibly different itag set (some itags                # are missing from DASH manifest pointed by webpage's dashmpd, some - from DASH                # manifest pointed by get_video_info's dashmpd).                # The general idea is to take a union of itags of both DASH manifests (for example                # video with such 'manifest behavior' see https://github.com/rg3/youtube-dl/issues/6093)                self.report_video_info_webpage_download(video_id)                for el in ('info', 'embedded', 'detailpage', 'vevo', ''):                    query = {                        'video_id': video_id,                        'ps': 'default',                        'eurl': '',                        'gl': 'US',                        'hl': 'en',                    }                    if el:                        query['el'] = el                    if sts:                        query['sts'] = sts                    video_info_webpage = self._download_webpage(                        '%s://www.youtube.com/get_video_info' % proto,                        video_id, note=False,                        errnote='unable to download video info webpage',                        fatal=False, query=query)                    if not video_info_webpage:                        continue                    get_video_info = compat_parse_qs(video_info_webpage)                    add_dash_mpd(get_video_info)                    if view_count is None:                        view_count = extract_view_count(get_video_info)                    if not video_info:                        video_info = get_video_info                    if 'token' in get_video_info:                        # Different get_video_info requests may report different results, e.g.                        # some may report video unavailability, but some may serve it without                        # any complaint (see https://github.com/rg3/youtube-dl/issues/7362,                        # the original webpage as well as el=info and el=embedded get_video_info                        # requests report video unavailability due to geo restriction while                        # el=detailpage succeeds and returns valid data). This is probably                        # due to YouTube measures against IP ranges of hosting providers.                        # Working around by preferring the first succeeded video_info containing                        # the token if no such video_info yet was found.                        if 'token' not in video_info:                            video_info = get_video_info                        break        if 'token' not in video_info:            if 'reason' in video_info:                if 'The uploader has not made this video available in your country.' in video_info['reason']:                    regions_allowed = self._html_search_meta(                        'regionsAllowed', video_webpage, default=None)                    countries = regions_allowed.split(',') if regions_allowed else None                    self.raise_geo_restricted(                        msg=video_info['reason'][0], countries=countries)                raise ExtractorError(                    'YouTube said: %s' % video_info['reason'][0],                    expected=True, video_id=video_id)            else:                raise ExtractorError(                    '"token" parameter not in video info for unknown reason',                    video_id=video_id)
        # title        if 'title' in video_info:            video_title = video_info['title'][0]        else:            self._downloader.report_warning('Unable to extract video title')            video_title = '_'
        # description        description_original = video_description = get_element_by_id("eow-description", video_webpage)        if video_description:
            def replace_url(m):                redir_url = compat_urlparse.urljoin(url, m.group(1))                parsed_redir_url = compat_urllib_parse_urlparse(redir_url)                if re.search(r'^(?:www\.)?(?:youtube(?:-nocookie)?\.com|youtu\.be)$', parsed_redir_url.netloc) and parsed_redir_url.path == '/redirect':                    qs = compat_parse_qs(parsed_redir_url.query)                    q = qs.get('q')                    if q and q[0]:                        return q[0]                return redir_url
            description_original = video_description = re.sub(r'''(?x)
                <a\s+                    (?:[a-zA-Z-]+="[^"]*"\s+)*?                    (?:title|href)="([^"]+)"\s+                    (?:[a-zA-Z-]+="[^"]*"\s+)*?                    class="[^"]*"[^>]*>                [^<]+\.{3}\s*                </a>            ''', replace_url, video_description)
            video_description = clean_html(video_description)        else:            fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)            if fd_mobj:                video_description = unescapeHTML(fd_mobj.group(1))            else:                video_description = ''
        if 'multifeed_metadata_list' in video_info and not smuggled_data.get('force_singlefeed', False):            if not self._downloader.params.get('noplaylist'):                entries = []                feed_ids = []                multifeed_metadata_list = video_info['multifeed_metadata_list'][0]                for feed in multifeed_metadata_list.split(','):                    # Unquote should take place before split on comma (,) since textual                    # fields may contain comma as well (see                    # https://github.com/rg3/youtube-dl/issues/8536)                    feed_data = compat_parse_qs(compat_urllib_parse_unquote_plus(feed))                    entries.append({                        '_type': 'url_transparent',                        'ie_key': 'Youtube',                        'url': smuggle_url(                            '%s://www.youtube.com/watch?v=%s' % (proto, feed_data['id'][0]),                            {'force_singlefeed': True}),                        'title': '%s (%s)' % (video_title, feed_data['title'][0]),                    })                    feed_ids.append(feed_data['id'][0])                self.to_screen(                    'Downloading multifeed video (%s) - add --no-playlist to just download video %s'                    % (', '.join(feed_ids), video_id))                return self.playlist_result(entries, video_id, video_title, video_description)            self.to_screen('Downloading just video %s because of --no-playlist' % video_id)
        if view_count is None:            view_count = extract_view_count(video_info)
        # Check for "rental" videos        if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:            raise ExtractorError('"rental" videos not supported. See https://github.com/rg3/youtube-dl/issues/359 for more information.', expected=True)
        # Start extracting information        self.report_information_extraction(video_id)
        # uploader        if 'author' not in video_info:            raise ExtractorError('Unable to extract uploader name')        video_uploader = compat_urllib_parse_unquote_plus(video_info['author'][0])
        # uploader_id        video_uploader_id = None        video_uploader_url = None        mobj = re.search(            r'<link itemprop="url" href="(?P<uploader_url>https?://www\.youtube\.com/(?:user|channel)/(?P<uploader_id>[^"]+))">',            video_webpage)        if mobj is not None:            video_uploader_id = mobj.group('uploader_id')            video_uploader_url = mobj.group('uploader_url')        else:            self._downloader.report_warning('unable to extract uploader nickname')
        # thumbnail image        # We try first to get a high quality image:        m_thumb = re.search(r'<span itemprop="thumbnail".*?href="(.*?)">',                            video_webpage, re.DOTALL)        if m_thumb is not None:            video_thumbnail = m_thumb.group(1)        elif 'thumbnail_url' not in video_info:            self._downloader.report_warning('unable to extract video thumbnail')            video_thumbnail = None        else:   # don't panic if we can't find it            video_thumbnail = compat_urllib_parse_unquote_plus(video_info['thumbnail_url'][0])
        # upload date        upload_date = self._html_search_meta(            'datePublished', video_webpage, 'upload date', default=None)        if not upload_date:            upload_date = self._search_regex(                [r'(?s)id="eow-date.*?>(.*?)</span>',                 r'(?:id="watch-uploader-info".*?>.*?|["\']simpleText["\']\s*:\s*["\'])(?:Published|Uploaded|Streamed live|Started) on (.+?)[<"\']'],                video_webpage, 'upload date', default=None)        upload_date = unified_strdate(upload_date)
        video_license = self._html_search_regex(            r'<h4[^>]+class="title"[^>]*>\s*License\s*</h4>\s*<ul[^>]*>\s*<li>(.+?)</li',            video_webpage, 'license', default=None)
        m_music = re.search(            r'''(?x)
                <h4[^>]+class="title"[^>]*>\s*Music\s*</h4>\s*                <ul[^>]*>\s*                <li>(?P<title>.+?)                by (?P<creator>.+?)                (?:                    \(.+?\)|                    <a[^>]*                        (?:                            \bhref=["\']/red[^>]*>|             # drop possible                            >\s*Listen ad-free with YouTube Red # YouTube Red ad                        )                    .*?                )?</li            ''',
            video_webpage)        if m_music:            video_alt_title = remove_quotes(unescapeHTML(m_music.group('title')))            video_creator = clean_html(m_music.group('creator'))        else:            video_alt_title = video_creator = None
        m_episode = re.search(            r'<div[^>]+id="watch7-headline"[^>]*>\s*<span[^>]*>.*?>(?P<series>[^<]+)</a></b>\s*S(?P<season>\d+)\s*•\s*E(?P<episode>\d+)</span>',            video_webpage)        if m_episode:            series = m_episode.group('series')            season_number = int(m_episode.group('season'))            episode_number = int(m_episode.group('episode'))        else:            series = season_number = episode_number = None
        m_cat_container = self._search_regex(            r'(?s)<h4[^>]*>\s*Category\s*</h4>\s*<ul[^>]*>(.*?)</ul>',            video_webpage, 'categories', default=None)        if m_cat_container:            category = self._html_search_regex(                r'(?s)<a[^<]+>(.*?)</a>', m_cat_container, 'category',                default=None)            video_categories = None if category is None else [category]        else:            video_categories = None
        video_tags = [            unescapeHTML(m.group('content'))            for m in re.finditer(self._meta_regex('og:video:tag'), video_webpage)]
        def _extract_count(count_name):            return str_to_int(self._search_regex(                r'-%s-button[^>]+><span[^>]+class="yt-uix-button-content"[^>]*>([\d,]+)</span>'                % re.escape(count_name),                video_webpage, count_name, default=None))
        like_count = _extract_count('like')        dislike_count = _extract_count('dislike')
        # subtitles        video_subtitles = self.extract_subtitles(video_id, video_webpage)        automatic_captions = self.extract_automatic_captions(video_id, video_webpage)
        video_duration = try_get(            video_info, lambda x: int_or_none(x['length_seconds'][0]))        if not video_duration:            video_duration = parse_duration(self._html_search_meta(                'duration', video_webpage, 'video duration'))
        # annotations        video_annotations = None        if self._downloader.params.get('writeannotations', False):            video_annotations = self._extract_annotations(video_id)
        chapters = self._extract_chapters(description_original, video_duration)
        if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):            self.report_rtmp_download()            formats = [{                'format_id': '_rtmp',                'protocol': 'rtmp',                'url': video_info['conn'][0],                'player_url': player_url,            }]        elif len(video_info.get('url_encoded_fmt_stream_map', [''])[0]) >= 1 or len(video_info.get('adaptive_fmts', [''])[0]) >= 1:            encoded_url_map = video_info.get('url_encoded_fmt_stream_map', [''])[0] + ',' + video_info.get('adaptive_fmts', [''])[0]            if 'rtmpe%3Dyes' in encoded_url_map:                raise ExtractorError('rtmpe downloads are not supported, see https://github.com/rg3/youtube-dl/issues/343 for more information.', expected=True)            formats_spec = {}            fmt_list = video_info.get('fmt_list', [''])[0]            if fmt_list:                for fmt in fmt_list.split(','):                    spec = fmt.split('/')                    if len(spec) > 1:                        width_height = spec[1].split('x')                        if len(width_height) == 2:                            formats_spec[spec[0]] = {                                'resolution': spec[1],                                'width': int_or_none(width_height[0]),                                'height': int_or_none(width_height[1]),                            }            formats = []            for url_data_str in encoded_url_map.split(','):                url_data = compat_parse_qs(url_data_str)                if 'itag' not in url_data or 'url' not in url_data:                    continue                format_id = url_data['itag'][0]                url = url_data['url'][0]
                if 's' in url_data or self._downloader.params.get('youtube_include_dash_manifest', True):                    ASSETS_RE = r'"assets":.+?"js":\s*("[^"]+")'                    jsplayer_url_json = self._search_regex(                        ASSETS_RE,                        embed_webpage if age_gate else video_webpage,                        'JS player URL (1)', default=None)                    if not jsplayer_url_json and not age_gate:                        # We need the embed website after all                        if embed_webpage is None:                            embed_url = proto + '://www.youtube.com/embed/%s' % video_id                            embed_webpage = self._download_webpage(                                embed_url, video_id, 'Downloading embed webpage')                        jsplayer_url_json = self._search_regex(                            ASSETS_RE, embed_webpage, 'JS player URL')
                    player_url = json.loads(jsplayer_url_json)                    if player_url is None:                        player_url_json = self._search_regex(                            r'ytplayer\.config.*?"url"\s*:\s*("[^"]+")',                            video_webpage, 'age gate player URL')                        player_url = json.loads(player_url_json)
                if 'sig' in url_data:                    url += '&signature=' + url_data['sig'][0]                elif 's' in url_data:                    encrypted_sig = url_data['s'][0]
                    if self._downloader.params.get('verbose'):                        if player_url is None:                            player_version = 'unknown'                            player_desc = 'unknown'                        else:                            if player_url.endswith('swf'):                                player_version = self._search_regex(                                    r'-(.+?)(?:/watch_as3)?\.swf$', player_url,                                    'flash player', fatal=False)                                player_desc = 'flash player %s' % player_version                            else:                                player_version = self._search_regex(                                    [r'html5player-([^/]+?)(?:/html5player(?:-new)?)?\.js',                                     r'(?:www|player)-([^/]+)(?:/[a-z]{2}_[A-Z]{2})?/base\.js'],                                    player_url,                                    'html5 player', fatal=False)                                player_desc = 'html5 player %s' % player_version
                        parts_sizes = self._signature_cache_id(encrypted_sig)                        self.to_screen('{%s} signature length %s, %s' %                                       (format_id, parts_sizes, player_desc))
                    signature = self._decrypt_signature(                        encrypted_sig, video_id, player_url, age_gate)                    url += '&signature=' + signature                if 'ratebypass' not in url:                    url += '&ratebypass=yes'
                dct = {                    'format_id': format_id,                    'url': url,                    'player_url': player_url,                }                if format_id in self._formats:                    dct.update(self._formats[format_id])                if format_id in formats_spec:                    dct.update(formats_spec[format_id])
                # Some itags are not included in DASH manifest thus corresponding formats will                # lack metadata (see https://github.com/rg3/youtube-dl/pull/5993).                # Trying to extract metadata from url_encoded_fmt_stream_map entry.                mobj = re.search(r'^(?P<width>\d+)[xX](?P<height>\d+)$', url_data.get('size', [''])[0])                width, height = (int(mobj.group('width')), int(mobj.group('height'))) if mobj else (None, None)
                more_fields = {                    'filesize': int_or_none(url_data.get('clen', [None])[0]),                    'tbr': float_or_none(url_data.get('bitrate', [None])[0], 1000),                    'width': width,                    'height': height,                    'fps': int_or_none(url_data.get('fps', [None])[0]),                    'format_note': url_data.get('quality_label', [None])[0] or url_data.get('quality', [None])[0],                }                for key, value in more_fields.items():                    if value:                        dct[key] = value                type_ = url_data.get('type', [None])[0]                if type_:                    type_split = type_.split(';')                    kind_ext = type_split[0].split('/')                    if len(kind_ext) == 2:                        kind, _ = kind_ext                        dct['ext'] = mimetype2ext(type_split[0])                        if kind in ('audio', 'video'):                            codecs = None                            for mobj in re.finditer(                                    r'(?P<key>[a-zA-Z_-]+)=(?P<quote>["\']?)(?P<val>.+?)(?P=quote)(?:;|$)', type_):                                if mobj.group('key') == 'codecs':                                    codecs = mobj.group('val')                                    break                            if codecs:                                dct.update(parse_codecs(codecs))                formats.append(dct)        elif video_info.get('hlsvp'):            manifest_url = video_info['hlsvp'][0]            formats = []            m3u8_formats = self._extract_m3u8_formats(                manifest_url, video_id, 'mp4', fatal=False)            for a_format in m3u8_formats:                itag = self._search_regex(                    r'/itag/(\d+)/', a_format['url'], 'itag', default=None)                if itag:                    a_format['format_id'] = itag                    if itag in self._formats:                        dct = self._formats[itag].copy()                        dct.update(a_format)                        a_format = dct                a_format['player_url'] = player_url                # Accept-Encoding header causes failures in live streams on Youtube and Youtube Gaming                a_format.setdefault('http_headers', {})['Youtubedl-no-compression'] = 'True'                formats.append(a_format)        else:            unavailable_message = self._html_search_regex(                r'(?s)<h1[^>]+id="unavailable-message"[^>]*>(.+?)</h1>',                video_webpage, 'unavailable message', default=None)            if unavailable_message:                raise ExtractorError(unavailable_message, expected=True)            raise ExtractorError('no conn, hlsvp or url_encoded_fmt_stream_map information found in video info')
        # Look for the DASH manifest        if self._downloader.params.get('youtube_include_dash_manifest', True):            dash_mpd_fatal = True            for mpd_url in dash_mpds:                dash_formats = {}                try:                    def decrypt_sig(mobj):                        s = mobj.group(1)                        dec_s = self._decrypt_signature(s, video_id, player_url, age_gate)                        return '/signature/%s' % dec_s
                    mpd_url = re.sub(r'/s/([a-fA-F0-9\.]+)', decrypt_sig, mpd_url)
                    for df in self._extract_mpd_formats(                            mpd_url, video_id, fatal=dash_mpd_fatal,                            formats_dict=self._formats):                        # Do not overwrite DASH format found in some previous DASH manifest                        if df['format_id'] not in dash_formats:                            dash_formats[df['format_id']] = df                        # Additional DASH manifests may end up in HTTP Error 403 therefore                        # allow them to fail without bug report message if we already have                        # some DASH manifest succeeded. This is temporary workaround to reduce                        # burst of bug reports until we figure out the reason and whether it                        # can be fixed at all.                        dash_mpd_fatal = False                except (ExtractorError, KeyError) as e:                    self.report_warning(                        'Skipping DASH manifest: %r' % e, video_id)                if dash_formats:                    # Remove the formats we found through non-DASH, they                    # contain less info and it can be wrong, because we use                    # fixed values (for example the resolution). See                    # https://github.com/rg3/youtube-dl/issues/5774 for an                    # example.                    formats = [f for f in formats if f['format_id'] not in dash_formats.keys()]                    formats.extend(dash_formats.values())
        # Check for malformed aspect ratio        stretched_m = re.search(            r'<meta\s+property="og:video:tag".*?content="yt:stretch=(?P<w>[0-9]+):(?P<h>[0-9]+)">',            video_webpage)        if stretched_m:            w = float(stretched_m.group('w'))            h = float(stretched_m.group('h'))            # yt:stretch may hold invalid ratio data (e.g. for Q39EVAstoRM ratio is 17:0).            # We will only process correct ratios.            if w > 0 and h > 0:                ratio = w / h                for f in formats:                    if f.get('vcodec') != 'none':                        f['stretched_ratio'] = ratio
        self._sort_formats(formats)
        self.mark_watched(video_id, video_info)
        return {            'id': video_id,            'uploader': video_uploader,            'uploader_id': video_uploader_id,            'uploader_url': video_uploader_url,            'upload_date': upload_date,            'license': video_license,            'creator': video_creator,            'title': video_title,            'alt_title': video_alt_title,            'thumbnail': video_thumbnail,            'description': video_description,            'categories': video_categories,            'tags': video_tags,            'subtitles': video_subtitles,            'automatic_captions': automatic_captions,            'duration': video_duration,            'age_limit': 18 if age_gate else 0,            'annotations': video_annotations,            'chapters': chapters,            'webpage_url': proto + '://www.youtube.com/watch?v=%s' % video_id,            'view_count': view_count,            'like_count': like_count,            'dislike_count': dislike_count,            'average_rating': float_or_none(video_info.get('avg_rating', [None])[0]),            'formats': formats,            'is_live': is_live,            'start_time': start_time,            'end_time': end_time,            'series': series,            'season_number': season_number,            'episode_number': episode_number,        }

class YoutubePlaylistIE(YoutubePlaylistBaseInfoExtractor):    IE_DESC = 'YouTube.com playlists'    _VALID_URL = r"""(?x)(?:
                        (?:https?://)?                        (?:\w+\.)?                        (?:                            youtube\.com/                            (?:                               (?:course|view_play_list|my_playlists|artist|playlist|watch|embed/(?:videoseries|[0-9A-Za-z_-]{11}))                               \? (?:.*?[&;])*? (?:p|a|list)=                            |  p/                            )|                            youtu\.be/[0-9A-Za-z_-]{11}\?.*?\blist=                        )                        (                            (?:PL|LL|EC|UU|FL|RD|UL|TL)?[0-9A-Za-z-_]{10,}                            # Top tracks, they can also include dots                            |(?:MC)[\w\.]*                        )                        .*                     |                        (%(playlist_id)s)                     )""" % {'playlist_id': YoutubeBaseInfoExtractor._PLAYLIST_ID_RE}
    _TEMPLATE_URL = 'https://www.youtube.com/playlist?list=%s'    _VIDEO_RE = r'href="\s*/watch\?v=(?P<id>[0-9A-Za-z_-]{11})&amp;[^"]*?index=(?P<index>\d+)(?:[^>]+>(?P<title>[^<]+))?'    IE_NAME = 'youtube:playlist'    _TESTS = [{        'url': 'https://www.youtube.com/playlist?list=PLwiyx1dc3P2JR9N8gQaQN_BCvlSlap7re',        'info_dict': {            'title': 'ytdl test PL',            'id': 'PLwiyx1dc3P2JR9N8gQaQN_BCvlSlap7re',        },        'playlist_count': 3,    }, {        'url': 'https://www.youtube.com/playlist?list=PLtPgu7CB4gbZDA7i_euNxn75ISqxwZPYx',        'info_dict': {            'id': 'PLtPgu7CB4gbZDA7i_euNxn75ISqxwZPYx',            'title': 'YDL_Empty_List',        },        'playlist_count': 0,        'skip': 'This playlist is private',    }, {        'note': 'Playlist with deleted videos (#651). As a bonus, the video #51 is also twice in this list.',        'url': 'https://www.youtube.com/playlist?list=PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC',        'info_dict': {            'title': '29C3: Not my department',            'id': 'PLwP_SiAcdui0KVebT0mU9Apz359a4ubsC',        },        'playlist_count': 95,    }, {        'note': 'issue #673',        'url': 'PLBB231211A4F62143',        'info_dict': {            'title': '[OLD]Team Fortress 2 (Class-based LP)',            'id': 'PLBB231211A4F62143',        },        'playlist_mincount': 26,    }, {        'note': 'Large playlist',        'url': 'https://www.youtube.com/playlist?list=UUBABnxM4Ar9ten8Mdjj1j0Q',        'info_dict': {            'title': 'Uploads from Cauchemar',            'id': 'UUBABnxM4Ar9ten8Mdjj1j0Q',        },        'playlist_mincount': 799,    }, {        'url': 'PLtPgu7CB4gbY9oDN3drwC3cMbJggS7dKl',        'info_dict': {            'title': 'YDL_safe_search',            'id': 'PLtPgu7CB4gbY9oDN3drwC3cMbJggS7dKl',        },        'playlist_count': 2,        'skip': 'This playlist is private',    }, {        'note': 'embedded',        'url': 'https://www.youtube.com/embed/videoseries?list=PL6IaIsEjSbf96XFRuNccS_RuEXwNdsoEu',        'playlist_count': 4,        'info_dict': {            'title': 'JODA15',            'id': 'PL6IaIsEjSbf96XFRuNccS_RuEXwNdsoEu',        }    }, {        'url': 'http://www.youtube.com/embed/_xDOZElKyNU?list=PLsyOSbh5bs16vubvKePAQ1x3PhKavfBIl',        'playlist_mincount': 485,        'info_dict': {            'title': '2017 華語最新單曲 (2/24更新)',            'id': 'PLsyOSbh5bs16vubvKePAQ1x3PhKavfBIl',        }    }, {        'note': 'Embedded SWF player',        'url': 'https://www.youtube.com/p/YN5VISEtHet5D4NEvfTd0zcgFk84NqFZ?hl=en_US&fs=1&rel=0',        'playlist_count': 4,        'info_dict': {            'title': 'JODA7',            'id': 'YN5VISEtHet5D4NEvfTd0zcgFk84NqFZ',        }    }, {        'note': 'Buggy playlist: the webpage has a "Load more" button but it doesn\'t have more videos',        'url': 'https://www.youtube.com/playlist?list=UUXw-G3eDE9trcvY2sBMM_aA',        'info_dict': {            'title': 'Uploads from Interstellar Movie',            'id': 'UUXw-G3eDE9trcvY2sBMM_aA',        },        'playlist_mincount': 21,    }, {        # Playlist URL that does not actually serve a playlist        'url': 'https://www.youtube.com/watch?v=FqZTN594JQw&list=PLMYEtVRpaqY00V9W81Cwmzp6N6vZqfUKD4',        'info_dict': {            'id': 'FqZTN594JQw',            'ext': 'webm',            'title': "Smiley's People 01 detective, Adventure Series, Action",            'uploader': 'STREEM',            'uploader_id': 'UCyPhqAZgwYWZfxElWVbVJng',            'uploader_url': r're:https?://(?:www\.)?youtube\.com/channel/UCyPhqAZgwYWZfxElWVbVJng',            'upload_date': '20150526',            'license': 'Standard YouTube License',            'description': 'md5:507cdcb5a49ac0da37a920ece610be80',            'categories': ['People & Blogs'],            'tags': list,            'like_count': int,            'dislike_count': int,        },        'params': {            'skip_download': True,        },        'add_ie': [YoutubeIE.ie_key()],    }, {        'url': 'https://youtu.be/yeWKywCrFtk?list=PL2qgrgXsNUG5ig9cat4ohreBjYLAPC0J5',        'info_dict': {            'id': 'yeWKywCrFtk',            'ext': 'mp4',            'title': 'Small Scale Baler and Braiding Rugs',            'uploader': 'Backus-Page House Museum',            'uploader_id': 'backuspagemuseum',            'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/backuspagemuseum',            'upload_date': '20161008',            'license': 'Standard YouTube License',            'description': 'md5:800c0c78d5eb128500bffd4f0b4f2e8a',            'categories': ['Nonprofits & Activism'],            'tags': list,            'like_count': int,            'dislike_count': int,        },        'params': {            'noplaylist': True,            'skip_download': True,        },    }, {        'url': 'https://youtu.be/uWyaPkt-VOI?list=PL9D9FC436B881BA21',        'only_matching': True,    }, {        'url': 'TLGGrESM50VT6acwMjAyMjAxNw',        'only_matching': True,    }]
    def _real_initialize(self):        self._login()
    def _extract_mix(self, playlist_id):        # The mixes are generated from a single video        # the id of the playlist is just 'RD' + video_id        ids = []        last_id = playlist_id[-11:]        for n in itertools.count(1):            url = 'https://youtube.com/watch?v=%s&list=%s' % (last_id, playlist_id)            webpage = self._download_webpage(                url, playlist_id, 'Downloading page {0} of Youtube mix'.format(n))            new_ids = orderedSet(re.findall(                r'''(?xs)data-video-username=".*?".*?
                           href="/watch\?v=([0-9A-Za-z_-]{11})&amp;[^"]*?list=%s''' % re.escape(playlist_id),
                webpage))            # Fetch new pages until all the videos are repeated, it seems that            # there are always 51 unique videos.            new_ids = [_id for _id in new_ids if _id not in ids]            if not new_ids:                break            ids.extend(new_ids)            last_id = ids[-1]
        url_results = self._ids_to_results(ids)
        search_title = lambda class_name: get_element_by_attribute('class', class_name, webpage)        title_span = (            search_title('playlist-title') or            search_title('title long-title') or            search_title('title'))        title = clean_html(title_span)
        return self.playlist_result(url_results, playlist_id, title)
    def _extract_playlist(self, playlist_id):        url = self._TEMPLATE_URL % playlist_id        page = self._download_webpage(url, playlist_id)
        # the yt-alert-message now has tabindex attribute (see https://github.com/rg3/youtube-dl/issues/11604)        for match in re.findall(r'<div class="yt-alert-message"[^>]*>([^<]+)</div>', page):            match = match.strip()            # Check if the playlist exists or is private            mobj = re.match(r'[^<]*(?:The|This) playlist (?P<reason>does not exist|is private)[^<]*', match)            if mobj:                reason = mobj.group('reason')                message = 'This playlist %s' % reason                if 'private' in reason:                    message += ', use --username or --netrc to access it'                message += '.'                raise ExtractorError(message, expected=True)            elif re.match(r'[^<]*Invalid parameters[^<]*', match):                raise ExtractorError(                    'Invalid parameters. Maybe URL is incorrect.',                    expected=True)            elif re.match(r'[^<]*Choose your language[^<]*', match):                continue            else:                self.report_warning('Youtube gives an alert message: ' + match)
        playlist_title = self._html_search_regex(            r'(?s)<h1 class="pl-header-title[^"]*"[^>]*>\s*(.*?)\s*</h1>',            page, 'title', default=None)
        _UPLOADER_BASE = r'class=["\']pl-header-details[^>]+>\s*<li>\s*<a[^>]+\bhref='        uploader = self._search_regex(            r'%s["\']/(?:user|channel)/[^>]+>([^<]+)' % _UPLOADER_BASE,            page, 'uploader', default=None)        mobj = re.search(            r'%s(["\'])(?P<path>/(?:user|channel)/(?P<uploader_id>.+?))\1' % _UPLOADER_BASE,            page)        if mobj:            uploader_id = mobj.group('uploader_id')            uploader_url = compat_urlparse.urljoin(url, mobj.group('path'))        else:            uploader_id = uploader_url = None
        has_videos = True
        if not playlist_title:            try:                # Some playlist URLs don't actually serve a playlist (e.g.                # https://www.youtube.com/watch?v=FqZTN594JQw&list=PLMYEtVRpaqY00V9W81Cwmzp6N6vZqfUKD4)                next(self._entries(page, playlist_id))            except StopIteration:                has_videos = False
        playlist = self.playlist_result(            self._entries(page, playlist_id), playlist_id, playlist_title)        playlist.update({            'uploader': uploader,            'uploader_id': uploader_id,            'uploader_url': uploader_url,        })
        return has_videos, playlist
    def _check_download_just_video(self, url, playlist_id):        # Check if it's a video-specific URL        query_dict = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)        video_id = query_dict.get('v', [None])[0] or self._search_regex(            r'(?:(?:^|//)youtu\.be/|youtube\.com/embed/(?!videoseries))([0-9A-Za-z_-]{11})', url,            'video id', default=None)        if video_id:            if self._downloader.params.get('noplaylist'):                self.to_screen('Downloading just video %s because of --no-playlist' % video_id)                return video_id, self.url_result(video_id, 'Youtube', video_id=video_id)            else:                self.to_screen('Downloading playlist %s - add --no-playlist to just download video %s' % (playlist_id, video_id))                return video_id, None        return None, None
    def _real_extract(self, url):        # Extract playlist id        mobj = re.match(self._VALID_URL, url)        if mobj is None:            raise ExtractorError('Invalid URL: %s' % url)        playlist_id = mobj.group(1) or mobj.group(2)
        video_id, video = self._check_download_just_video(url, playlist_id)        if video:            return video
        if playlist_id.startswith(('RD', 'UL', 'PU')):            # Mixes require a custom extraction process            return self._extract_mix(playlist_id)
        has_videos, playlist = self._extract_playlist(playlist_id)        if has_videos or not video_id:            return playlist
        # Some playlist URLs don't actually serve a playlist (see        # https://github.com/rg3/youtube-dl/issues/10537).        # Fallback to plain video extraction if there is a video id        # along with playlist id.        return self.url_result(video_id, 'Youtube', video_id=video_id)

class YoutubeChannelIE(YoutubePlaylistBaseInfoExtractor):    IE_DESC = 'YouTube.com channels'    _VALID_URL = r'https?://(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/(?P<id>[0-9A-Za-z_-]+)'    _TEMPLATE_URL = 'https://www.youtube.com/channel/%s/videos'    _VIDEO_RE = r'(?:title="(?P<title>[^"]+)"[^>]+)?href="/watch\?v=(?P<id>[0-9A-Za-z_-]+)&?'    IE_NAME = 'youtube:channel'    _TESTS = [{        'note': 'paginated channel',        'url': 'https://www.youtube.com/channel/UCKfVa3S1e4PHvxWcwyMMg8w',        'playlist_mincount': 91,        'info_dict': {            'id': 'UUKfVa3S1e4PHvxWcwyMMg8w',            'title': 'Uploads from lex will',        }    }, {        'note': 'Age restricted channel',        # from https://www.youtube.com/user/DeusExOfficial        'url': 'https://www.youtube.com/channel/UCs0ifCMCm1icqRbqhUINa0w',        'playlist_mincount': 64,        'info_dict': {            'id': 'UUs0ifCMCm1icqRbqhUINa0w',            'title': 'Uploads from Deus Ex',        },    }]
    @classmethod    def suitable(cls, url):        return (False if YoutubePlaylistsIE.suitable(url) or YoutubeLiveIE.suitable(url)                else super(YoutubeChannelIE, cls).suitable(url))
    def _build_template_url(self, url, channel_id):        return self._TEMPLATE_URL % channel_id
    def _real_extract(self, url):        channel_id = self._match_id(url)
        url = self._build_template_url(url, channel_id)
        # Channel by page listing is restricted to 35 pages of 30 items, i.e. 1050 videos total (see #5778)        # Workaround by extracting as a playlist if managed to obtain channel playlist URL        # otherwise fallback on channel by page extraction        channel_page = self._download_webpage(            url + '?view=57', channel_id,            'Downloading channel page', fatal=False)        if channel_page is False:            channel_playlist_id = False        else:            channel_playlist_id = self._html_search_meta(                'channelId', channel_page, 'channel id', default=None)            if not channel_playlist_id:                channel_url = self._html_search_meta(                    ('al:ios:url', 'twitter:app:url:iphone', 'twitter:app:url:ipad'),                    channel_page, 'channel url', default=None)                if channel_url:                    channel_playlist_id = self._search_regex(                        r'vnd\.youtube://user/([0-9A-Za-z_-]+)',                        channel_url, 'channel id', default=None)        if channel_playlist_id and channel_playlist_id.startswith('UC'):            playlist_id = 'UU' + channel_playlist_id[2:]            return self.url_result(                compat_urlparse.urljoin(url, '/playlist?list=%s' % playlist_id), 'YoutubePlaylist')
        channel_page = self._download_webpage(url, channel_id, 'Downloading page #1')        autogenerated = re.search(r'''(?x)
                class="[^"]*?(?:                    channel-header-autogenerated-label|                    yt-channel-title-autogenerated                )[^"]*"''', channel_page) is not None

        if autogenerated:            # The videos are contained in a single page            # the ajax pages can't be used, they are empty            entries = [                self.url_result(                    video_id, 'Youtube', video_id=video_id,                    video_title=video_title)                for video_id, video_title in self.extract_videos_from_page(channel_page)]            return self.playlist_result(entries, channel_id)
        try:            next(self._entries(channel_page, channel_id))        except StopIteration:            alert_message = self._html_search_regex(                r'(?s)<div[^>]+class=(["\']).*?\byt-alert-message\b.*?\1[^>]*>(?P<alert>[^<]+)</div>',                channel_page, 'alert', default=None, group='alert')            if alert_message:                raise ExtractorError('Youtube said: %s' % alert_message, expected=True)
        return self.playlist_result(self._entries(channel_page, channel_id), channel_id)

class YoutubeUserIE(YoutubeChannelIE):    IE_DESC = 'YouTube.com user videos (URL or "ytuser" keyword)'    _VALID_URL = r'(?:(?:https?://(?:\w+\.)?youtube\.com/(?:(?P<user>user|c)/)?(?!(?:attribution_link|watch|results)(?:$|[^a-z_A-Z0-9-])))|ytuser:)(?!feed/)(?P<id>[A-Za-z0-9_-]+)'    _TEMPLATE_URL = 'https://www.youtube.com/%s/%s/videos'    IE_NAME = 'youtube:user'
    _TESTS = [{        'url': 'https://www.youtube.com/user/TheLinuxFoundation',        'playlist_mincount': 320,        'info_dict': {            'id': 'UUfX55Sx5hEFjoC3cNs6mCUQ',            'title': 'Uploads from The Linux Foundation',        }    }, {        # Only available via https://www.youtube.com/c/12minuteathlete/videos        # but not https://www.youtube.com/user/12minuteathlete/videos        'url': 'https://www.youtube.com/c/12minuteathlete/videos',        'playlist_mincount': 249,        'info_dict': {            'id': 'UUVjM-zV6_opMDx7WYxnjZiQ',            'title': 'Uploads from 12 Minute Athlete',        }    }, {        'url': 'ytuser:phihag',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/c/gametrailers',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/gametrailers',        'only_matching': True,    }, {        # This channel is not available, geo restricted to JP        'url': 'https://www.youtube.com/user/kananishinoSMEJ/videos',        'only_matching': True,    }]
    @classmethod    def suitable(cls, url):        # Don't return True if the url can be extracted with other youtube        # extractor, the regex would is too permissive and it would match.        other_yt_ies = iter(klass for (name, klass) in globals().items() if name.startswith('Youtube') and name.endswith('IE') and klass is not cls)        if any(ie.suitable(url) for ie in other_yt_ies):            return False        else:            return super(YoutubeUserIE, cls).suitable(url)
    def _build_template_url(self, url, channel_id):        mobj = re.match(self._VALID_URL, url)        return self._TEMPLATE_URL % (mobj.group('user') or 'user', mobj.group('id'))

class YoutubeLiveIE(YoutubeBaseInfoExtractor):    IE_DESC = 'YouTube.com live streams'    _VALID_URL = r'(?P<base_url>https?://(?:\w+\.)?youtube\.com/(?:(?:user|channel|c)/)?(?P<id>[^/]+))/live'    IE_NAME = 'youtube:live'
    _TESTS = [{        'url': 'https://www.youtube.com/user/TheYoungTurks/live',        'info_dict': {            'id': 'a48o2S1cPoo',            'ext': 'mp4',            'title': 'The Young Turks - Live Main Show',            'uploader': 'The Young Turks',            'uploader_id': 'TheYoungTurks',            'uploader_url': r're:https?://(?:www\.)?youtube\.com/user/TheYoungTurks',            'upload_date': '20150715',            'license': 'Standard YouTube License',            'description': 'md5:438179573adcdff3c97ebb1ee632b891',            'categories': ['News & Politics'],            'tags': ['Cenk Uygur (TV Program Creator)', 'The Young Turks (Award-Winning Work)', 'Talk Show (TV Genre)'],            'like_count': int,            'dislike_count': int,        },        'params': {            'skip_download': True,        },    }, {        'url': 'https://www.youtube.com/channel/UC1yBKRuGpC1tSM73A0ZjYjQ/live',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/c/CommanderVideoHq/live',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/TheYoungTurks/live',        'only_matching': True,    }]
    def _real_extract(self, url):        mobj = re.match(self._VALID_URL, url)        channel_id = mobj.group('id')        base_url = mobj.group('base_url')        webpage = self._download_webpage(url, channel_id, fatal=False)        if webpage:            page_type = self._og_search_property(                'type', webpage, 'page type', default=None)            video_id = self._html_search_meta(                'videoId', webpage, 'video id', default=None)            if page_type == 'video' and video_id and re.match(r'^[0-9A-Za-z_-]{11}$', video_id):                return self.url_result(video_id, YoutubeIE.ie_key())        return self.url_result(base_url)

class YoutubePlaylistsIE(YoutubePlaylistsBaseInfoExtractor):    IE_DESC = 'YouTube.com user/channel playlists'    _VALID_URL = r'https?://(?:\w+\.)?youtube\.com/(?:user|channel)/(?P<id>[^/]+)/playlists'    IE_NAME = 'youtube:playlists'
    _TESTS = [{        'url': 'https://www.youtube.com/user/ThirstForScience/playlists',        'playlist_mincount': 4,        'info_dict': {            'id': 'ThirstForScience',            'title': 'Thirst for Science',        },    }, {        # with "Load more" button        'url': 'https://www.youtube.com/user/igorkle1/playlists?view=1&sort=dd',        'playlist_mincount': 70,        'info_dict': {            'id': 'igorkle1',            'title': 'Игорь Клейнер',        },    }, {        'url': 'https://www.youtube.com/channel/UCiU1dHvZObB2iP6xkJ__Icw/playlists',        'playlist_mincount': 17,        'info_dict': {            'id': 'UCiU1dHvZObB2iP6xkJ__Icw',            'title': 'Chem Player',        },    }]

class YoutubeSearchIE(SearchInfoExtractor, YoutubePlaylistIE):    IE_DESC = 'YouTube.com searches'    # there doesn't appear to be a real limit, for example if you search for    # 'python' you get more than 8.000.000 results    _MAX_RESULTS = float('inf')    IE_NAME = 'youtube:search'    _SEARCH_KEY = 'ytsearch'    _EXTRA_QUERY_ARGS = {}    _TESTS = []
    def _get_n_results(self, query, n):        """Get a specified number of results for a query"""
        videos = []        limit = n
        url_query = {            'search_query': query.encode('utf-8'),        }        url_query.update(self._EXTRA_QUERY_ARGS)        result_url = 'https://www.youtube.com/results?' + compat_urllib_parse_urlencode(url_query)
        for pagenum in itertools.count(1):            data = self._download_json(                result_url, video_id='query "%s"' % query,                note='Downloading page %s' % pagenum,                errnote='Unable to download API page',                query={'spf': 'navigate'})            html_content = data[1]['body']['content']
            if 'class="search-message' in html_content:                raise ExtractorError(                    '[youtube] No video results', expected=True)
            new_videos = self._ids_to_results(orderedSet(re.findall(                r'href="/watch\?v=(.{11})', html_content)))            videos += new_videos            if not new_videos or len(videos) > limit:                break            next_link = self._html_search_regex(                r'href="(/results\?[^"]*\bsp=[^"]+)"[^>]*>\s*<span[^>]+class="[^"]*\byt-uix-button-content\b[^"]*"[^>]*>Next',                html_content, 'next link', default=None)            if next_link is None:                break            result_url = compat_urlparse.urljoin('https://www.youtube.com/', next_link)
        if len(videos) > n:            videos = videos[:n]        return self.playlist_result(videos, query)

class YoutubeSearchDateIE(YoutubeSearchIE):    IE_NAME = YoutubeSearchIE.IE_NAME + ':date'    _SEARCH_KEY = 'ytsearchdate'    IE_DESC = 'YouTube.com searches, newest videos first'    _EXTRA_QUERY_ARGS = {'search_sort': 'video_date_uploaded'}

class YoutubeSearchURLIE(YoutubePlaylistBaseInfoExtractor):    IE_DESC = 'YouTube.com search URLs'    IE_NAME = 'youtube:search_url'    _VALID_URL = r'https?://(?:www\.)?youtube\.com/results\?(.*?&)?(?:search_query|q)=(?P<query>[^&]+)(?:[&]|$)'    _VIDEO_RE = r'href="\s*/watch\?v=(?P<id>[0-9A-Za-z_-]{11})(?:[^"]*"[^>]+\btitle="(?P<title>[^"]+))?'    _TESTS = [{        'url': 'https://www.youtube.com/results?baz=bar&search_query=youtube-dl+test+video&filters=video&lclk=video',        'playlist_mincount': 5,        'info_dict': {            'title': 'youtube-dl test video',        }    }, {        'url': 'https://www.youtube.com/results?q=test&sp=EgQIBBgB',        'only_matching': True,    }]
    def _real_extract(self, url):        mobj = re.match(self._VALID_URL, url)        query = compat_urllib_parse_unquote_plus(mobj.group('query'))        webpage = self._download_webpage(url, query)        return self.playlist_result(self._process_page(webpage), playlist_title=query)

class YoutubeShowIE(YoutubePlaylistsBaseInfoExtractor):    IE_DESC = 'YouTube.com (multi-season) shows'    _VALID_URL = r'https?://(?:www\.)?youtube\.com/show/(?P<id>[^?#]*)'    IE_NAME = 'youtube:show'    _TESTS = [{        'url': 'https://www.youtube.com/show/airdisasters',        'playlist_mincount': 5,        'info_dict': {            'id': 'airdisasters',            'title': 'Air Disasters',        }    }]
    def _real_extract(self, url):        playlist_id = self._match_id(url)        return super(YoutubeShowIE, self)._real_extract(            'https://www.youtube.com/show/%s/playlists' % playlist_id)

class YoutubeFeedsInfoExtractor(YoutubeBaseInfoExtractor):    """
    Base class for feed extractors    Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.    """
    _LOGIN_REQUIRED = True
    @property    def IE_NAME(self):        return 'youtube:%s' % self._FEED_NAME
    def _real_initialize(self):        self._login()
    def _real_extract(self, url):        page = self._download_webpage(            'https://www.youtube.com/feed/%s' % self._FEED_NAME, self._PLAYLIST_TITLE)
        # The extraction process is the same as for playlists, but the regex        # for the video ids doesn't contain an index        ids = []        more_widget_html = content_html = page        for page_num in itertools.count(1):            matches = re.findall(r'href="\s*/watch\?v=([0-9A-Za-z_-]{11})', content_html)
            # 'recommended' feed has infinite 'load more' and each new portion spins            # the same videos in (sometimes) slightly different order, so we'll check            # for unicity and break when portion has no new videos            new_ids = filter(lambda video_id: video_id not in ids, orderedSet(matches))            if not new_ids:                break
            ids.extend(new_ids)
            mobj = re.search(r'data-uix-load-more-href="/?(?P<more>[^"]+)"', more_widget_html)            if not mobj:                break
            more = self._download_json(                'https://youtube.com/%s' % mobj.group('more'), self._PLAYLIST_TITLE,                'Downloading page #%s' % page_num,                transform_source=uppercase_escape)            content_html = more['content_html']            more_widget_html = more['load_more_widget_html']
        return self.playlist_result(            self._ids_to_results(ids), playlist_title=self._PLAYLIST_TITLE)

class YoutubeWatchLaterIE(YoutubePlaylistIE):    IE_NAME = 'youtube:watchlater'    IE_DESC = 'Youtube watch later list, ":ytwatchlater" for short (requires authentication)'    _VALID_URL = r'https?://(?:www\.)?youtube\.com/(?:feed/watch_later|(?:playlist|watch)\?(?:.+&)?list=WL)|:ytwatchlater'
    _TESTS = [{        'url': 'https://www.youtube.com/playlist?list=WL',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/watch?v=bCNU9TrbiRk&index=1&list=WL',        'only_matching': True,    }]
    def _real_extract(self, url):        _, video = self._check_download_just_video(url, 'WL')        if video:            return video        _, playlist = self._extract_playlist('WL')        return playlist

class YoutubeFavouritesIE(YoutubeBaseInfoExtractor):    IE_NAME = 'youtube:favorites'    IE_DESC = 'YouTube.com favourite videos, ":ytfav" for short (requires authentication)'    _VALID_URL = r'https?://(?:www\.)?youtube\.com/my_favorites|:ytfav(?:ou?rites)?'    _LOGIN_REQUIRED = True
    def _real_extract(self, url):        webpage = self._download_webpage('https://www.youtube.com/my_favorites', 'Youtube Favourites videos')        playlist_id = self._search_regex(r'list=(.+?)["&]', webpage, 'favourites playlist id')        return self.url_result(playlist_id, 'YoutubePlaylist')

class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):    IE_DESC = 'YouTube.com recommended videos, ":ytrec" for short (requires authentication)'    _VALID_URL = r'https?://(?:www\.)?youtube\.com/feed/recommended|:ytrec(?:ommended)?'    _FEED_NAME = 'recommended'    _PLAYLIST_TITLE = 'Youtube Recommended videos'

class YoutubeSubscriptionsIE(YoutubeFeedsInfoExtractor):    IE_DESC = 'YouTube.com subscriptions feed, "ytsubs" keyword (requires authentication)'    _VALID_URL = r'https?://(?:www\.)?youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'    _FEED_NAME = 'subscriptions'    _PLAYLIST_TITLE = 'Youtube Subscriptions'

class YoutubeHistoryIE(YoutubeFeedsInfoExtractor):    IE_DESC = 'Youtube watch history, ":ythistory" for short (requires authentication)'    _VALID_URL = r'https?://(?:www\.)?youtube\.com/feed/history|:ythistory'    _FEED_NAME = 'history'    _PLAYLIST_TITLE = 'Youtube History'

class YoutubeTruncatedURLIE(InfoExtractor):    IE_NAME = 'youtube:truncated_url'    IE_DESC = False  # Do not list    _VALID_URL = r'''(?x)
        (?:https?://)?        (?:\w+\.)?[yY][oO][uU][tT][uU][bB][eE](?:-nocookie)?\.com/        (?:watch\?(?:            feature=[a-z_]+|            annotation_id=annotation_[^&]+|            x-yt-cl=[0-9]+|            hl=[^&]*|            t=[0-9]+        )?        |            attribution_link\?a=[^&]+        )        $    '''

    _TESTS = [{        'url': 'https://www.youtube.com/watch?annotation_id=annotation_3951667041',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/watch?',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/watch?x-yt-cl=84503534',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/watch?feature=foo',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/watch?hl=en-GB',        'only_matching': True,    }, {        'url': 'https://www.youtube.com/watch?t=2372',        'only_matching': True,    }]
    def _real_extract(self, url):        raise ExtractorError(            'Did you forget to quote the URL? Remember that & is a meta '            'character in most shells, so you want to put the URL in quotes, '            'like  youtube-dl '            '"https://www.youtube.com/watch?feature=foo&v=BaW_jenozKc" '            ' or simply  youtube-dl BaW_jenozKc  .',            expected=True)

class YoutubeTruncatedIDIE(InfoExtractor):    IE_NAME = 'youtube:truncated_id'    IE_DESC = False  # Do not list    _VALID_URL = r'https?://(?:www\.)?youtube\.com/watch\?v=(?P<id>[0-9A-Za-z_-]{1,10})$'
    _TESTS = [{        'url': 'https://www.youtube.com/watch?v=N_708QY7Ob',        'only_matching': True,    }]
    def _real_extract(self, url):        video_id = self._match_id(url)        raise ExtractorError(            'Incomplete YouTube ID %s. URL %s looks truncated.' % (video_id, url),            expected=True)