Build it. Use Go. Maybe nknorg/nnet for P2P. Signed HLS segments. Have Go also serve the web front-end with a WASM web worker. Public nodes can run on a very lightweight VPS/server with an autocert domain. Viewers browser join the swarm with WASM-- this way people can just type in a web address so it's very user friendly but the domain doesn't actually have to serve any data. I would just use a trusted pubkey to sign P2P updates so nodes can block naughty IP addresses. Should get you very friendly user experience, easy node deployment, pretty low latency, and bittorrent level of legal resilience.