Youtube-dl doesn't download videos from youtube

[ghost]

sabayonx86-64 paolo # youtube-dl https://www.youtube.com/watch?v=bwASJWS8ltM
[youtube] bwASJWS8ltM: Downloading webpage
[youtube] bwASJWS8ltM: Downloading video info webpage
[youtube] bwASJWS8ltM: Extracting video information
[youtube] bwASJWS8ltM: Downloading js player en_US-vflnrstgx
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 877, in _decrypt_signature
video_id, player_url, s
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 792, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 855, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/lib64/python2.7/site-packages/youtube_dl/jsinterp.py", line 241, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'gr'; 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.
(caused by ExtractorError(u"Could not find JS function u'gr'; 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.",)); 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.
sabayonx86-64 paolo #

[dstftw]

You are using an outdated version of youtube-dl. Read our FAQ if you have troubles updating.