Remember that we’re talking about a server on your local network, and a device on the local network to make the connection for the stream. We aren’t talking about streaming over the internet.

• Client looks up server via DNS
• Client connects to public IP
• Client handshakes to server
• Server announces to client available connections (public, local)
• Client continues connections with local address

There is no need for tailscale or anything, this is a local connection. The only thing the public address is doing is the initial call to the server.