The economics fundamentally changed a couple of years ago when cloudflare released R2. I don't know if anyone has built a streaming client for it yet, but R2 takes the largest expense (outgoing bandwidth) and zeroes it out.

Yor business would be wholly dependent on cloudflare. But if you don't have to pay for bandwidth, the economics aren't that bad.

(I ran a large porn site a lifetime ago, long before cdns were ubiquitous. If I was in the business today, I would absolutely put everything on R2 and make it work no matter how much client development it took)