@ -1019,6 +1019,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
"""Turn the encrypted s field into a working signature"""
if player_url is not None:
if player_url.startswith(u'//'):
player_url = u'https:' + player_url
try:
player_id = (player_url, len(s))
if player_id not in self._player_cache: