[imdb] Relax _VALID_URL (closes #13056)

youtube_dl/extractor/imdb.py

@@ -13,7 +13,7 @@ from ..utils import (
 class ImdbIE(InfoExtractor):
     IE_NAME = 'imdb'
     IE_DESC = 'Internet Movie Database trailers'
-    _VALID_URL = r'https?://(?:www|m)\.imdb\.com/(?:video/[^/]+/|title/tt\d+.*?#lb-|videoplayer/)vi(?P<id>\d+)'
+    _VALID_URL = r'https?://(?:www|m)\.imdb\.com/(?:video|title).+?[/-]vi(?P<id>\d+)'
 
     _TESTS = [{
         'url': 'http://www.imdb.com/video/imdb/vi2524815897',
@@ -35,6 +35,9 @@ class ImdbIE(InfoExtractor):
     }, {
         'url': 'http://www.imdb.com/videoplayer/vi1562949145',
         'only_matching': True,
+    }, {
+        'url': 'http://www.imdb.com/title/tt4218696/videoplayer/vi2608641561',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):