Use the Mozilla certificate store as much as possible

[Kdmeizk]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.09.01. 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 Issues with outdated version will be rejected.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 2018.09.01

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

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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Description of your issue, suggested solution and other information

This suggestion should prevent nearly all problems related to missing certificates. If a certificate is not available in the Mozilla certificate store, check the availability of this certificate in the operating system store.

Possible file to use containing the Mozilla certificate store:
https://curl.haxx.se/docs/caextract.html