You don't need separate accounts to interact with different kinds of Fediverse servers.

For example, if you have a Mastodon account you can follow PeerTube accounts such as @theatticdwellers or @alliterative and their videos will appear in your Mastodon timeline as if they were Mastodon posts.

If you reply to a PeerTube video within Mastodon, the reply will also appear as a comment below that video on PeerTube. (And comments made on PeerTube will appear as replies on Mastodon.)

@feditips clear as mud. Each time I've tried to access content on some other instance I'm asked to login. And it won't accept my credentials. I must still be doing something wrong but I've never heard of the sites you reference.

@dpscifi @feditips I agree, this is the main thing that I believe is unclear to new users - why do I need to copy/paste a link to my own server when browsing another server?

I've figured out how to live with it now, but I remember when I first joined, this was a big hurdle, and I think it's worth letting people browse and interact withother servers while staying logged into their own server, rather than having to copy/paste the link in order to interact.