So zap stream uses cloudflare BTW. I saw thst option too. If you have owncast why are you bothering with zap stream? Just for the nostr chat?
I'm heading to bed but I think I have the solution for us. You can stream with owncast, and then you make a podcast with the live item option. This tells podcast clients (some can do video) to go to your owncast setver rtmp stream. You can still get zaps from the rss clients.
I will record my thoughts when I wake up but I think we can figure this out and it will be epic.