Thought I would try the Zoom thing again on the latest Dunfell 3.1.10
So I tried Zoom on Firefox in a container.
No luck. Zoom couldn't see the built in laptop cam, usb webcam.... nothing
Zoom on Firefox not in a container... works perfectly
I tried the built in microphone and webcam. I added a usb webcam. I added an additional microphone. Everything worked just as it was supposed to with no glitches at all!! So far 
This is great. I use Zoom often and kept a puppy to dual boot into just for Zoom/Skype. Now I can use Easy OS for pretty much everything.