[userbinator]

Yes, that is definitely possible and might make for a fun project. Use stego to make the livestream look innocuous and apply heavy ECC, further resisting censorship and arousal of suspicion. I think this is the closest I've seen to a public implementation of that idea: https://news.ycombinator.com/item?id=12166332

You'd still need an uplink but the upload bandwidth usage is a fraction of the download one for typical Internet usage.

Perhaps the chat/comments (once again with heavy stego/encryption) would work?

Related and older idea: https://en.wikipedia.org/wiki/ArVid