ERROR: Signature extraction failed message just after Downloading js player

[ghost]

-> % youtube-dl https://www.youtube.com/watch\?v\=8MmW_GOFS8I --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://www.youtube.com/watch?v=8MmW_GOFS8I', '--verbose']
[debug] Encodings: locale US-ASCII, fs utf-8, out US-ASCII, pref US-ASCII
[debug] youtube-dl version 2014.11.04
[debug] Python version 2.7.6 - Darwin-14.0.0-x86_64-i386-64bit
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] Confirming age
[youtube] 8MmW_GOFS8I: Downloading webpage
[youtube] 8MmW_GOFS8I: Downloading video info webpage
[youtube] 8MmW_GOFS8I: Extracting video information
[youtube] 8MmW_GOFS8I: Encrypted signatures detected.
[youtube] {43} signature length 40.42, html5 player en_US-vflM7pYrM
[youtube] 8MmW_GOFS8I: Downloading js player vflM7pYrM
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 539, in _decrypt_signature
video_id, player_url, s
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 453, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 514, in _parse_sig_js
'Initial JS player signature function name')
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 436, in _search_regex
raise RegexNotFoundError('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.
(caused by RegexNotFoundError(u'Unable to extract \x1b[0;34mInitial JS player signature function name\x1b[0m; 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/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 539, in _decrypt_signature
video_id, player_url, s
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 453, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 514, in _parse_sig_js
'Initial JS player signature function name')
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 436, in _search_regex
raise RegexNotFoundError('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/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 536, in extract_info
ie_result = ie.extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 199, in extract
return self._real_extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 934, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 549, 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 539, in _decrypt_signature
video_id, player_url, s
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 453, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 514, in _parse_sig_js
'Initial JS player signature function name')
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 436, in _search_regex
raise RegexNotFoundError('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.
(caused by RegexNotFoundError(u'Unable to extract \x1b[0;34mInitial JS player signature function name\x1b[0m; 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.

[phihag]

You are using an outdated version of youtube-dl (the YouTube player changed on November 13th, 2014, so you'll need youtube-dl 2014.11.13 or newer). See our FAQ on how to update.

We tried notifying you in advance by adding

Make sure you are using the latest version; type youtube-dl -U to update.

to the error output. Was there something in there that you did not understand? Can you suggest how we could rephrase the output to advise users to update before reporting bugs? Don't get me wrong, I appreciate every bug report we get, but it would be a lot simpler both for users and developers when users would update to the current version before reporting bugs.

[ghost]

you could add

(even if you just ran brew upgrade)

because I just did that. i was relying on brew upgrade to keep me up to date and in a false sense of security I ignored your message, but apparently it is a few days behind.