Yes. This is how the internet was meant to be and how the Fediverse works. I just posted an Owncast lviestream to Lemmy and you could watch the livestream right in Lemmy. SOmeone can comment or like a Peertube video from Mastodon and it reflects on the Peertube video itself. It should all interconnect.

I’d recommend checking out piefed.social as well as what others recommended.

Or better yet, build your own if that’s what you’re thinking. :-D Always room in the fediverse for more projects imo!