Zoom image glitchy

my video image keeps going glitchy. I've tried so many different things to resolve this: uninstalled and reinstalled zoom; changed computers; changed video cameras; moved to ethernet direct rather than via wifi; turned off all bluetooth hardware (keyboard, mouse, phone, etc.) while on zoom - this one seems to work the best and when i want to use the bluetooth keyboard again then the video signal goes wonky again. I've included a screen shot. I've reached out to my internet provider and because Zoom is the only program affected it seems this may be where I can find a solution to the problem. Any ideas?