@srgray looks like tchncs.de had a cap they were not aware of - we'll need to make a bug report for FramaSoft.
The bandwidth-like issues seem to be literally what they look like: bandwidth problems. I don't know PeerTube's infra well enough to know if we could bypass that - maybe by having some delay with a buffer, streaming to a few servers at once?
Whatever we come up with, we'll share widely, but for now I cannot dedicate too much time to that.