Cams not working

As the DM I can see everyones cameras (sometimes) but y players only see a few of each other. This is a recurring problem and i've seen several other people mention this with 0 resolution or even response from the team. IT's annoying that it's been happening on and off for years and still not sorted. 

Hi Euan! This is usually the state of affairs in my game, at the start. It generally takes a couple of minutes using the reconnect button in the settings tab, but then is steady for the rest of the game. Are you able to get a stable connection eventually?

In my game and those of other the GMs whose games I'm in, camera issues have almost always been due to the user's or their ISP's network or (once) their camera.  If they weren't working in Roll20 they weren't working in Discord either. Audio is a whole other situation. We (everyone in our gaming group) just quit trying with Roll20 and use Discord for both audio and visual. We disable Roll20 WebRTC. I sometimes use the jukebox - which doesn't need WebRTC  - for sound effects.