Hmm interesting i didn't know that.

I couldn't find much docs on how it works, just https://docs.joinpeertube.org/contribute/architecture#live

Sounds like they break the stream into very small segments and publish each of those with bit torrent (?), they seem to claim about 30 second delay and scale in the hundreds but not thousands. Certainly impressive if true, i wouldnt of thought such an approach would scale so well. Of course its still a far cry from twitch, but nonetheless impressive.

You can find more information in this article presenting results from a stress test: https://joinpeertube.org/news/stress-test-2023