"WebTorrent is a wonderful library that allowed PeerTube to be created five years ago. But due to many limitations of the library we decided to implement and default to another P2P protocol used in coordination with HLS. This new HLS player works very well, and does not have all the limitations of the WebTorrent player. It also allowed us to implement live streaming in PeerTube."

https://github.com/Chocobozzz/PeerTube/issues/5465

Thanks, now I am really curious to try that out and see how it works under the hood. What I need, would also be the option to ask users first, if they want to upload as well. People on a mobile connection should be able to opt out. (Quick search did not reveal this).

You can find this option in "My Settings", in the left menu.

"Help share videos being played"

Oh, that was easy. Thx.

This is what they use https://github.com/chocobozzz/p2p-media-loader forked from novage a while back. Nice explanation with diagrams at the link.

It has worked surprisingly well in my testing during livestreams when you can count on multiple simultaneous viewers.