RegexNotFoundError: Unable to extract Initial JS player signature function name;

[pillarsdotnet]

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-tt', '--verbose', 'http://www.youtube.com/watch?v=7PCkvCPvDXk']
[debug] Encodings: locale UTF-8, fs UTF-8, out None, pref UTF-8
[debug] youtube-dl version 2014.08.05
[debug] Python version 2.7.8 - Linux-3.16.0-24-lowlatency-x86_64-with-Ubuntu-14.10-utopic
[debug] Proxy map: {}
[youtube] Setting language
[youtube] 7PCkvCPvDXk: Downloading webpage
[youtube] 7PCkvCPvDXk: Downloading video info webpage
[youtube] 7PCkvCPvDXk: Extracting video information
[youtube] 7PCkvCPvDXk: Encrypted signatures detected.
[youtube] {22} signature length 44.42, html5 player en_US-vflEhuJxd
[youtube] 7PCkvCPvDXk: Downloading js player vflEhuJxd
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
    u'Initial JS player signature function name')
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
    raise RegexNotFoundError(u'Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
    u'Initial JS player signature function name')
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
    raise RegexNotFoundError(u'Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 516, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 170, in extract
    return self._real_extract(url)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 860, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 489, in _decrypt_signature
    u'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 479, in _decrypt_signature
    video_id, player_url, s
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 383, in _extract_signature_function
    res = self._parse_sig_js(code)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 454, in _parse_sig_js
    u'Initial JS player signature function name')
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 391, in _search_regex
    raise RegexNotFoundError(u'Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.

[pillarsdotnet]

Package: youtube-dl
Priority: extra
Section: universe/web
Installed-Size: 1469
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Rogério Brito <rbrito@ime.usp.br>
Architecture: all
Version: 2014.08.05-1
Depends: python-pkg-resources, python (>= 2.7), python (<< 2.8)
Recommends: libav-tools | ffmpeg, libav-tools | ffmpeg (>= 4:0.6) | ffprobe, mplayer2 | mplayer, rtmpdump
Filename: pool/universe/y/youtube-dl/youtube-dl_2014.08.05-1_all.deb
Size: 313804
MD5sum: adcde3ed56e98d70c481825c6b97a7fd
SHA1: 1b12f1426b94eacc87079b58deac0b8f232166f3
SHA256: da24be8d05e8b98610ab44a44be84c828d0977031e4da62238048297b9c68952

[phihag]

YouTube changed their player on November 13th, 2014, so you'll need youtube-dl 2014.11.13 or newer to download all videos. See our FAQ on how to update.