You can do that with docker too, not that it’s flawless of course, networking is just awful. Same thing on Podman.

There is no way the fediverse will replace youtube.

Youtube Is very expensive to host, and the proof is that there is no actual competitor to it.

Facebook gave traffic to links? In my experience Facebook is the worst platform for external content, almost no body sees the post.

I mean that’s what a link aggregator is basically. HN and Lemmy are link aggregators.