I would love to vote with my feet. How do I watch YouTube or Instagram content with VLC, or some other user friendly video player?
mpv understands URLs to these websites and uses yt-dlp to download them.
On KDE, I assigned an action to open some URLs with mpv, which means I can play then from the clipboard manager or the copy menu that is displayed when copying if it's enabled.
Look into LibRedirect and the projects it uses and also things like youtube-dl/yt-dlp.
https://libredirect.github.io/
https://libredirect.codeberg.page/
> A web extension that redirects YouTube, Instagram, Reddit, TikTok and other websites to alternative privacy-friendly frontends.
https://github.com/mendel5/alternative-front-ends
https://github.com/digitalblossom/alternative-frontends
https://www.privacyguides.org/en/frontends/
https://news.ycombinator.com/item?id=36146076