Youtube - ssl: certificate_verify_failed

[tremd]

python youtube-dl --verbose https://www.youtube.com/watch?v=wnuCSmqC7tI

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/watch?v=wnuCSm
qC7tI']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2015.02.06
[debug] Python version 2.7.9 - Windows-7-6.1.7601-SP1
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] wnuCSmqC7tI: Downloading webpage
ERROR: Unable to download webpage: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILE
D] certificate verify failed (_ssl.c:581)> (caused by URLError(SSLError(1, u'[SS
L: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)'),))
File "youtube-dl\youtube_dl\extractor\common.py", line 301, in _request_webpag
e
return self._downloader.urlopen(url_or_request)
File "youtube-dl\youtube_dl\YoutubeDL.py", line 1578, in urlopen
return self._opener.open(req, timeout=self._socket_timeout)
File "C:\Python27\lib\urllib2.py", line 431, in open
response = self._open(req, data)
File "C:\Python27\lib\urllib2.py", line 449, in _open
'_open', req)
File "C:\Python27\lib\urllib2.py", line 409, in _call_chain
result = func(_args)
File "youtube-dl\youtube_dl\utils.py", line 665, in https_open
req, *_kwargs)
File "C:\Python27\lib\urllib2.py", line 1197, in do_open
raise URLError(err)

[jaimeMF]

Can you check if it works with the --no-check-certificate option?

[tremd]

It works. But why windows certificate verify failed?

[jaimeMF]

We'll have to investigate the issue, using that option is a workaround (unsafe of course).

[tremd]

Is it only me?

[jaimeMF]

It works for me on windows both with python 2.7.9 and 3.4.2

[tremd]

I try python 2.7.8 and i don't get the error.

[jaimeMF]

But 2.7.8 can't verify the certificates, so it's the same as using the --no-check-certificate option. Are you willing to run youtube-dl from the source code with a small change to check if it loads the certificates?

[tremd]

i didn't know that.

so this is a windows/python problem cause of my configuration.
i think the problem is "windows function activate/deactivate" under system control.
i removed the IE complete.

python request something from ie to verify ssl?
without removing IE in a vm (win7) all seems fine.

I should close this issue, but I want to hear some opinions.

[jaimeMF]

I don't really know, I think it uses the system certificates but I don't know how it gets them.

[siso]

I get the same error on FreeBSD, Python 2.7.9, and youtube-dl==2015.4.17:

<urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)> (caused by URLError(SSLError(1, u'[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)'),))

Unfortunately --no-check-certificate does not work for me.

It seems to be an issue with old SSH certificates, and as pointed out in #4807, the following does the trick for me:

# pkg update ca_root_nss
export SSL_CERT_FILE=/usr/local/share/certs/ca-root-nss.crt

[Sevyls]

got the same error on OS X 10.10:

$ youtube-dl -F --verbose https://www.youtube.com/watch?v=#####
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-F', u'--verbose', u'https://www.youtube.com/watch?v=#####']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.06.15
[debug] Python version 2.7.9 - Darwin-14.3.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 2.2.3
[debug] Proxy map: {}
[youtube] #####: Downloading webpage
ERROR: Unable to download webpage: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)> (caused by URLError(SSLError(1, u'[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)'),))
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 312, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1730, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 431, in open
    response = self._open(req, data)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 449, in _open
    '_open', req)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/usr/local/bin/youtube-dl/youtube_dl/utils.py", line 713, in https_open
    req, **kwargs)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1197, in do_open
    raise URLError(err)

[jaimeMF]

@Sevyls that's not an issue with youtube-dl, it's caused by the openssl installed with Homebrew. Try with the solutions listed in these comments: #5317 (comment) and #5317 (comment).

[akiraaisha]

This works on me in Windows. Clearing SSL Cache. Hope it helps.
Internet Options->Content->Clear SSL State

[yan12125]

Thanks for the tip! I believe it can help others, so I copied it to #7309, which is the main issue for certificate errors on Windows. If you have any further findings, just leave comments there.