For massive video distribution, getting acquired by a company with "infinite bandwidth" is the sustainable approach.
Orchestrating p2p realtime video distribution is going to have a lot of problems, and spend VC money until someone acquires you is just a lot easier.
Here's a small list of challenges you'd face:
You'll need to have a pretty good distribution network to handle users who just can't manage to p2p connect.
Figuring out the right amount of user's bandwidth you can use without people getting upset; there's a lot of internet accounts with bandwidth quotas, especially for mobile
Trying to arrange so that users connect to users with the least transmission delays would be needed to reduce overall latency. Between cross oceanic connections having unavoidable latency, the potential of buffer bloat, and having a reasonable jitter buffer, pretty soon you have wild delays and potential rebuffering.
Bandwidth constraints / layer switching is going to be a big challenge; it's one thing when your server can just push the best stream the client can manage, but if you're streaming from a peer and the stream is too big, the peer probably doesn't have a smaller stream to switch to and there's no good way to know if where the bandwidth constraint is ... maybe you should switch to the same stream from someone else or maybe you should switch to a smaller stream. Can you get even packets from one peer and odd packets from another ... should you?
