This is a plugin I found recently and really enjoy. It gives you the opportunity to redirect several webpages to alternatives. For example Youtube to FreeTube or Piped. If I search for youtube in Firefox, FreeTube automatically opens and shows me my feed. I like it, I use it, I can recommend it.
Any chance it only redirects the watch URLs on YouTube? So you can use YouTube to find the videos and on clicking them links it takes you elsewhere?
This would be the ideal plugin behavior.
Nope, for that you should use something like Redirector, but I don’t think it allows random instance selection.
You can exclude
https://youtube.com/from redirection, that way, the YouTube homepage won’t be redirected, but all videos will be.