[sigmaml]

Evidently, it depends on multiple factors.

My son's school uses Google Meet for online classes. 2 instructors + 36 students per section. All participants have their videos switched on. Even when the bandwidth fluctuates, we haven't noticed issues. In particular, Meet degrades well: audio continues to be high quality, with video becoming grainy or getting suspended. But, that is pretty rare. And, slide shows are never a problem.

[kiwijamo]

Ah that is interesting. I work for a school for Deaf learners who use sign language. We rely on having good quality video so we can see each other. Your description of video degradion matches my observation. Unfortunately this is not suitable for our use case. Zoom maintains high quality video really well on the same connections meets will degrade quite badly. I've always thought there should be a switch to decide which of video or audio should receive priority.