I think you're confusing federated with p2p? Which is related but different: with federation fans gather in groups of say 150-250 on servers that are owned and adminned by one of that group and can be located ib whatever country, and those small servers communicate. So fandom's social network is hosted on a bunch of small servers that cost 120$ a year for everyone, all 150-250 ppl, rather than on giant central servers like the otw. But you're not distributing anything yourself. P2P is a hosting solution that could interoperate and be useful for large works like vids, but that's different and separate from federation.