ERROR: Signature extraction failed

[alfathdirk]

$ youtube-dl -v https://www.youtube.com/watch\?v\=P8jOQUsTU9o
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-v', u'https://www.youtube.com/watch?v=P8jOQUsTU9o']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.04.24
[debug] Python version 2.7.10 - Darwin-14.5.0-x86_64-i386-64bit
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] P8jOQUsTU9o: Downloading webpage
[youtube] P8jOQUsTU9o: Downloading video info webpage
[youtube] P8jOQUsTU9o: Extracting video information
[youtube] {22} signature length 40.43, html5 player en_US-vflkX1eCa
[youtube] P8jOQUsTU9o: Downloading player https://s.ytimg.com/yts/jsbin/player-en_US-vflkX1eCa/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 995, in _decrypt_signature
video_id, player_url, s
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 910, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 973, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/local/bin/youtube-dl/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'ur'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U 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'ur'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U 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; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 995, in _decrypt_signature

[dstftw]

You are using an outdated version of youtube-dl.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

[alfathdirk]

thanks, the problem with my internet conection for update version lol
ERROR: can't find the current version. Please try again later.

[yan12125]

Post the output of youtube-dl -v -U. Or you may want to manully delete the old version and download a new one.