[nitter] Add new extractor

[B0pol]

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• Bug fix
• Improvement
• New extractor
• New feature

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Description of your pull request and other information

Add an extractor for nitter, a "free and open source alternative Twitter front-end focused on privacy."

[selfisekai]

Nitter is just a Twitter frontend, even with the same URL scheme as Twitter. There should be just a modification to the Twitter extractor to match Nitter domains to it.

[B0pol]

#24349 is down…

That's what I did initally, but the nitter creator told me to create an extractor instead of just support nitter URLs in Twitter extractor,

because nitter proxies video and then Twitter does not know you, but only the nitter server.

Edit: nevermind, it's just my GitHub client.

#24349 (comment)

zedeus commented on 5 May
Personally I would prefer a new simple extractor that just reads the m3u8 url instead of going the Twitter route. This protects the user's privacy since it doesn't connect to Twitter directly, instead proxying the video through the Nitter server.

[Mennaruuk]

Hi! There have been more Nitter instances added, may you please add them to the extractor? Thank you!!

[B0pol]

I added all instances working.

[j3pic]

Nitter is open-source. It would be nice if youtube-dl could recognize it regardless of where it's found, especially now that I see public Nitter instances getting taken down. I could run Nitter on my LAN and not worry about takedowns.