That’s a great idea but you should provide detailed explanations or at least mention the platforms you are identifying. I am a little bit familiar with them but I still had to look them up.
Peertube
PeerTube is a free and open-source, decentralized, ActivityPub federated video platform. It can use peer-to-peer technology to reduce load on individual servers when videos get popular. As an ActivityPub platform, it is part of the federated network known as the Fediverse. https://joinpeertube.org/ https://en.wikipedia.org/wiki/PeerTube
Mastodon
Mastodon is a free and open-source software platform for decentralized social networking with microblogging features similar to Twitter. It operates as a federated network of independently managed servers that communicate using the ActivityPub protocol, allowing users to interact across different instances within the Fediverse. https://joinmastodon.org/ https://en.wikipedia.org/wiki/Mastodon_(social_network)
Friendica
Friendica (formerly Friendika, originally Mistpark) is a free and open-source software[5] distributed social network. It forms one part of the Fediverse, an interconnected and decentralized network of independently operated servers. https://friendi.ca/ https://en.wikipedia.org/wiki/Friendica
That’s a great idea but you should provide detailed explanations or at least mention the platforms you are identifying. I am a little bit familiar with them but I still had to look them up.
Peertube

PeerTube is a free and open-source, decentralized, ActivityPub federated video platform. It can use peer-to-peer technology to reduce load on individual servers when videos get popular. As an ActivityPub platform, it is part of the federated network known as the Fediverse.
https://joinpeertube.org/
https://en.wikipedia.org/wiki/PeerTube
Mastodon

Mastodon is a free and open-source software platform for decentralized social networking with microblogging features similar to Twitter. It operates as a federated network of independently managed servers that communicate using the ActivityPub protocol, allowing users to interact across different instances within the Fediverse.
https://joinmastodon.org/
https://en.wikipedia.org/wiki/Mastodon_(social_network)
Friendica

Friendica (formerly Friendika, originally Mistpark) is a free and open-source software[5] distributed social network. It forms one part of the Fediverse, an interconnected and decentralized network of independently operated servers.
https://friendi.ca/
https://en.wikipedia.org/wiki/Friendica
WHAT IS THE FEDIVERSE?
https://fedi.tips/what-is-mastodon-what-is-the-fediverse/
Thank you for providing this context!
Another resource for searching content and how and where and who runs the Fediverse and which software operates what and how big each platform is
https://fedidb.org/software
https://fediverse.observer/stats
https://the-federation.info/