[streamtape] add new extractor

[schnusch]

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What is the purpose of your pull request?

• Bug fix
• Improvement
• New extractor
• New feature

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Description of your pull request and other information

Add extractor for streamtape.com.

[liamengland1]

https://github.com/ytdl-org/youtube-dl#can-you-add-support-for-this-anime-video-site-or-site-which-shows-current-movies-for-free

Streamtape is mainly used to host pirate videos. For example:

https://streamtape.com/e/jAYxDXvY1KCz3yQ/
https://streamtape.com/v/29z7WXO663uZL7R/
https://streamtape.com/v/zL8qGMPx93FYMjd/

[nmcc1212]

@llacb47 that's a bullshit argument, that's like saying, YouTube has some free movies on it therefore it cannot be used. not all content on streamtape is piracy just like not all content on YouTube is piracy

[DominikNovosel]

Agreed. The site is very much general-purpose, and given its widespread use in my region, an extractor implementation would be very useful for archival purposes.