error during download movie from youtube

[aep99]

Dears,

I have gotten some error messages during download from Youtube:

kindly your support/ advice to solved it please.
Signature extraction failed: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py",
line 771, in _decrypt_signature video_id, player_url, s
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py",
line 663, 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-vfl2sXoyn/base.js';

Thank you in advance for your reply.
Best regards,
aep99.

[phihag]

Sorry, we cannot help you without the full output of youtube-dl when called with -v. See our bug reporting guidelines for more information. In particular, this output will tell us whether you are using the newest version, 2015.12.10 as of writing. If you are not, please make sure to update to the newest version first.

[dstftw]

You are using an outdated version of youtube-dl.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