SSL: CERTIFICATE_VERIFY_FAILED

[dspstudio]

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• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like that [x])
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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.01.25. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2017.01.25

Before submitting an issue make sure you have:

• At least skimmed through README and most notably FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-vf', 't7TTgGPhjj0']
WARNING: Assuming --restrict-filenames since file system encoding cannot encode all characters. Set the LC_ALL environment variable to fix this.
[debug] Encodings: locale ANSI_X3.4-1968, fs ascii, out ANSI_X3.4-1968, pref ANSI_X3.4-1968
[debug] youtube-dl version 2017.01.25
[debug] Python version 3.3.2 - Linux-2.6.32-042stab120.6-x86_64-with-centos-7.3.1611-Core
[debug] exe versions: ffmpeg 2.6.8, ffprobe 2.6.8
[debug] Proxy map: {}
Usage: youtube-dl [OPTIONS] URL [URL...]

youtube-dl: error: You must provide at least one URL.
Type youtube-dl --help to see a list of all options.
[dsp@30560 ~]$ python3 /usr/local/bin/youtube-dl -v t7TTgGPhjj0
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 't7TTgGPhjj0']
WARNING: Assuming --restrict-filenames since file system encoding cannot encode all characters. Set the LC_ALL environment variable to fix this.
[debug] Encodings: locale ANSI_X3.4-1968, fs ascii, out ANSI_X3.4-1968, pref ANSI_X3.4-1968
[debug] youtube-dl version 2017.01.25
[debug] Python version 3.3.2 - Linux-2.6.32-042stab120.6-x86_64-with-centos-7.3.1611-Core
[debug] exe versions: ffmpeg 2.6.8, ffprobe 2.6.8
[debug] Proxy map: {}
[youtube] t7TTgGPhjj0: Downloading webpage
ERROR: Unable to download webpage: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:547)> (caused by URLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:547)'),))
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 406, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2001, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib64/python3.3/urllib/request.py", line 469, in open
    response = self._open(req, data)
  File "/usr/lib64/python3.3/urllib/request.py", line 487, in _open
    '_open', req)
  File "/usr/lib64/python3.3/urllib/request.py", line 447, in _call_chain
    result = func(*args)
  File "/usr/local/bin/youtube-dl/youtube_dl/utils.py", line 1048, in https_open
    req, **kwargs)
  File "/usr/lib64/python3.3/urllib/request.py", line 1251, in do_open
    raise URLError(err)

...
<end of log>

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

Note that youtube-dl does not support sites dedicated to copyright infringement. In order for site support request to be accepted all provided example URLs should not violate any copyrights.

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Description of your issue, suggested solution and other information

tried with python 2, 2.7 and 3 and got same result on youtube and liveleak

[dstftw]

Duplicate of #2641.