The fediverse is getting its own TikTok competitor called Loops. When Noops? https://techcrunch.com/2024/10/25/the-fediverse-is-getting-its-own-tiktok-competitor-called-loops/
There are some of the decentralized implementations like 3speak etc. But all of them are required with video hosting level servers, which doesn't come cheap. Hive, SUB, Steem all of them host the video on external networks in their respectable sister sites which use the IPFS in the backend. I think Nostr can benefit from doing something similar?