Youtube is not ahead as of now, you can check on this website: https://drhyperion451.github.io/does-uBO-bypass-yt/ It also links to a guide.

Good thing that you can still self host it, post your favorite jitsi instances below for everyone to use.

I’ll start with this one: https://calls.disroot.org/

One thing that mastodon does is proxying all the media from the federated servers, lemmy does not do this… (yet)

For example on this comment page there are 9 domains trying to connect directly to me according to ublock origin. I suggest blocking all third party requests on your instance using ublock origins advanced mode because the website works fine without them, it might be mostly avatars?