ERROR: Signature extraction failed

[betoharres]

Hi, I'm trying to download a video with 6h length of meditation music, and I'm getting this error:

~ % youtube-dl --extract-audio --verbose --audio-format mp3 https://www.youtube.com/watch?v=TekWIV0e16Q
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'--extract-audio', u'--verbose', u'--audio-format', u'mp3', u'https://www.youtube.com/watch?v=TekWIV0e16Q']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.10.24
[debug] Python version 2.7.10 - Darwin-15.0.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 2.8.1, ffprobe 2.8.1
[debug] Proxy map: {}
[youtube] TekWIV0e16Q: Downloading webpage
[youtube] TekWIV0e16Q: Downloading video info webpage
[youtube] TekWIV0e16Q: Extracting video information
WARNING: unable to extract html5 player; 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.
[youtube] {22} signature length 40.42, html5 player None
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 817, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 709, 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; 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"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; 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 817, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 709, 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; 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/YoutubeDL.py", line 661, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 291, in extract
    return self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 1345, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 827, in _decrypt_signature
    'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 817, in _decrypt_signature
    video_id, player_url, s
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 709, 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; 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"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; 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.

My brew list( I'm using homebrew as package manager ):

% brew list                                                                                                  
android-ndk r10e
android-sdk 24.4.1
autoconf 2.69
boost 1.58.0
brew-cask 0.58.0
ctags 5.8_1
ffmpeg 2.8.1_1
freetype 2.6_1
gdbm 1.11
git 2.6.2
heroku-toolbelt 3.42.20
httpie 0.9.2_1
hub 2.2.1
imagemagick 6.9.2-4
jpeg 8d
kakoune HEAD
lame 3.99.5
libevent 2.0.22
libpng 1.6.18
libtiff 4.0.6
libtool 2.4.6
libvo-aacenc 0.1.3
libyaml 0.1.6_1
mysql 5.6.27
node 4.2.1
nvm 0.29.0
openssl 1.0.2d_1
pcre 8.37
pkg-config 0.28
postgresql 9.4.5
python 2.7.10_2
python3 3.5.0
qt 4.8.7_1
rbenv 0.4.0
rcm 1.2.3
readline 6.3.8
reattach-to-user-namespace 2.4
redis 3.0.5
ruby-build 20151024
sqlite 3.9.1
the_silver_searcher 0.31.0
tmux 2.1
vim 7.4.898
watch 3.3.10
x264 r2601
xvid 1.3.4
xz 5.2.2
youtube-dl 2015.10.24
zsh 5.1.1

[dstftw]

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

[betoharres]

Well, that was weird, I did $ brew update and the error persisted.
After doing $ brew upgrade youtube-dl it did work!
Thanks