Automatic signature extraction failed

[gorkha]

youtube-dl http://www.youtube.com/watch?v=-kusWfGYhQw --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['http://www.youtube.com/watch?v=-kusWfGYhQw', '--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.07.15-gentoo_no_offensive_sites
[debug] Python version 2.7.7 - Linux-3.12.21-gentoo-r1-x86_64-Intel-R-Core-TM-2_Quad_CPU_Q6600@_2.40GHz-with-gentoo-2.2
[debug] Proxy map: {}
[youtube] Setting language
[youtube] -kusWfGYhQw: Downloading webpage
[youtube] -kusWfGYhQw: Downloading video info webpage
[youtube] -kusWfGYhQw: Extracting video information
[youtube] -kusWfGYhQw: Encrypted signatures detected.
[youtube] encrypted signature length 84 (43.40), itag 18, html5 player en_US-vflWRK4zF/html5player
ERROR: Automatic 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, len(s)
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 352, in _extract_signature_function
player_type = id_m.group('ext')
AttributeError: 'NoneType' object has no attribute 'group'
; 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/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 877, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 352, in _extract_signature_function
player_type = id_m.group('ext')
AttributeError: 'NoneType' object has no attribute 'group'
Traceback (most recent call last):
File "/usr/lib64/python2.7/site-packages/youtube_dl/YoutubeDL.py", line 516, in extract_info
ie_result = ie.extract(url)
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/common.py", line 168, in extract
return self._real_extract(url)
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 1249, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 887, in _decrypt_signature
u'Automatic signature extraction failed: ' + tb, cause=e)
ExtractorError: Automatic 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, len(s)
File "/usr/lib64/python2.7/site-packages/youtube_dl/extractor/youtube.py", line 352, in _extract_signature_function
player_type = id_m.group('ext')
AttributeError: 'NoneType' object has no attribute 'group'
; 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.

[phihag]

You are using a modified version of youtube-dl, over which we youtube-dl developers don't have any control over. Also, since YouTube changed their player on August 25th, you'll need at least version 2014.08.25.

Either contact your package management or use our manual installation method to get the newest version.

In a pinch, this should do:

sudo emerge --unmerge youtube-dl
sudo wget https://yt-dl.org/downloads/latest/youtube-dl -O /usr/local/bin/youtube-dl
sudo chmod a+x /usr/local/bin/youtube-dl
hash -r

From then on, you'll be able to update with sudo youtube-dl -U.