Add "Copy=For" yt-dlp feature = ${referer} ${userAgent} ${url} to be able to paste m3u8 links in varia and download streams detected by third-party video-downloaders extensions

[audacieuxnumber1]

Hi!

so sometimes i use extension: "Cat-Catch":

https://github.com/xifangczy/cat-catch
https://github.com/xifangczy/URLProtocol

to detect and copy m3u8 links strrams of embed streaming TS videos, from for example anime sites like:

https://v6.voiranime.com/
https://v4.voiranime.ws/
https://anime-sama.fr/
https://streaming-integrale.com/
https://empire-anime.com/
https://aniwave.se/
https://kissanime.com.ru/

and i don't like use internal download manager of web browser because it may have bugs and i like use third parsers or third download managers to download these embed videos from these sites,
after researsh,

i discover that yt-dlp has generic downoader i.e. yt-dlp can download from sites that they do not officially support and i discovers that cat catch extension has section named: COPY:

"For the convenience of using third-party applications, customize the content written to the clipboard by the copy button"

https://cat-catch.bmmmd.com/docs/settings#keywords

and i discover tha the string structure to set in that "Copy=For" feature when we will copy/past link detected by cat catch extension in third downlaod managers that use yt-dlp is:

yt-dlp --referer ${referer} --user-agent ${userAgent} ${url}

so when we put the m3u8 link detected by cat catch in thirds parser or download manager that uses yt-dlp, we can download the embed video even if it is not supported offcially by yt-dlp, so we hope please varia will have the capacity to support this capital command:

yt-dlp --referer ${referer} --user-agent ${userAgent} ${url}

This way, we can paste the m3u8 links detected by the cat catch extension into varia and download embed streams from various sites supported by various third-party extensions. Thanks!