Poor video performance when using TURN

Video performance is pretty poor when using TURN. It usually starts off smoothly and then the framerate degrades quickly. The issue is not reproducible when running a TURN server in LAN, so it's not to rule out that this is just a general issue with slower/higher latency network setups. Needs more investigation.

The issue names no files, tests, or entry points. Start by reproducing the framerate degradation through a remote TURN server and comparing it with a LAN TURN setup. Done means identifying the cause of the performance loss and validating that video remains stable under the affected network conditions.

Written by the indexing model from the issue text.