[viki] Prefer hls

youtube_dl/extractor/viki.py

@@ -284,7 +284,7 @@ class VikiIE(VikiBaseIE):
                 if format_id == 'm3u8':
                     m3u8_formats = self._extract_m3u8_formats(
                         format_url, video_id, 'mp4',
-                        entry_protocol='m3u8_native', preference=-1,
+                        entry_protocol='m3u8_native',
                         m3u8_id='m3u8-%s' % protocol, fatal=False)
                     # Despite CODECS metadata in m3u8 all video-only formats
                     # are actually video+audio