ERROR: Automatic signature extraction failed:

[Miethpo]

not a clue what the error is here. some kind of new signature that youtube-dl's not aware of yet?

[user@ethan]-[~/music]-[$ youtube-dl https://www.youtube.com/watch?v=Npp7ZFOgpyM --verbose[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://www.youtube.com/watch?v=Npp7ZFOgpyM', '--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.07.15
[debug] Python version 2.7.8 - Linux-3.14-2-amd64-x86_64-with-debian-jessie-sid
[debug] Proxy map: {}
[youtube] Setting language
[youtube] Npp7ZFOgpyM: Downloading webpage
[youtube] Npp7ZFOgpyM: Downloading video info webpage
[youtube] Npp7ZFOgpyM: Extracting video information
[youtube] Npp7ZFOgpyM: Encrypted signatures detected.
[youtube] encrypted signature length 84 (68.12.2), itag 22, html5 player en_US-vflEyBLiy\/html5player
ERROR: Automatic signature extraction failed: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 877, in _decrypt_signature
    video_id, player_url, len(s)
  File "/usr/lib/python2.7/dist-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/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 877, in _decrypt_signature
    video_id, player_url, len(s)
  File "/usr/lib/python2.7/dist-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/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 168, in extract
    return self._real_extract(url)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1249, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/usr/lib/python2.7/dist-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/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 877, in _decrypt_signature
    video_id, player_url, len(s)
  File "/usr/lib/python2.7/dist-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.

[Miethpo]

checked issues before posting this and saw nothing related so assumed it was still around, was using a version 20 days out of date from the debian repos, newest version does not have this problem.

[phihag]

Great that you figured it out by yourself. Just for reference, where did you check. About a third of all our issues in the last weeks were identical (or very close to) to this one.