Mar 23 14:38:29.320 - [ERROR] Except stack:Traceback (most recent call last): 
 "/home/future_suse/xx-net/gae_proxy/local/proxy_handler.py", line 219, in do_CONNECT_AGENT self.raw_requestline = self.rfile.readline(65537) 
 "/usr/lib64/python2.7/socket.py", line 476, in readline data = self._sock.recv(self._rbufsize) 
 "/usr/lib64/python2.7/ssl.py", line 722, in recv return self.read(buflen) 
 "/usr/lib64/python2.7/ssl.py", line 616, in read v = self._sslobj.read(len or 1024) SSLError: [SSL: TLSV1_ALERT_UNKNOWN_CA] tlsv1 alert unknown ca (_ssl.c:1750)
ERROR: Signature extraction failed: Traceback (most recent call last):

 "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 658, in _decrypt_signature
video_id, player_url, s

 "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 550, in _extract_signature_function
raise ExtractorError('Cannot identify player %r' % player_url)ExtractorError: Cannot identify player u'https://s.ytimg.com/yts/jsbin/player-en_US-vfl5u6mls/base.js'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see
https://yt-dl.org/update
on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.