Nostr is not there yet, but it will be. Rumble is the solution at the moment. You can just mirror your YT content to Rumble and direct your followers there.

Nostr, the place where people continue to post hyperlinks to media content deluding themselves into thinking contents themselves are being stored in a decentralized way, is not a solution. Nostr is just a place to post hyperlinks (or other text). You still need videos to be hosted somewhere, be it on YouTube, on "nostr.build", on Rumble or anywhere else.