[youtube] ssl certificate invalid error

[Efimero]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.01.05. 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 Issues with outdated version will be rejected.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 2017.01.05

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• Searched the bugtracker for similar issues including closed ones

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• 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)
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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 ```):

D:\yt>youtube-dl.exe -v
[debug] System config: []
[debug] User config: ['-u', 'PRIVATE', '-p', 'PRIVATE']
[debug] Custom config: []
[debug] Command-line args: ['-v']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2017.01.05
[debug] Python version 3.4.4 - Windows-7-6.1.7601-SP1
[debug] exe versions: none
[debug] Proxy map: {}

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Description of your issue, suggested solution and other information

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Whenever I attempt to login to Youtube from youtube-dl, I receive the following error:

WARNING: unable to fetch login page: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)>
ERROR: Unable to download webpage: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)> (caused by URLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)'),))

This has been happening since New Year (01/01/2017 00:00) and has affected every version of youtube-dl since the one I had installed at the time (probably november's release) up to the current one.
I have no reason to believe a change in my environment caused this. I suppose it is also not an issue directly with youtube-dl, but I can't confirm it by myself.
Any help would be welcome. I do not know what else to provide for tracking this bug.

[yan12125]

it is also not an issue directly with youtube-dl

You're right. See #11573 (comment)