Hi there - I have been in the business of supporting one of the world's largest Banks with one of the largest deployments of internal video collaboration over 40,000 video endpoints. I have used & abused multiple PC, MAC, Linux, Mobile & Tablets in optimising internal Video Conferencing and Video Chat with Customers. Internal guides to optimise the lighting conditions, optimal camera height and configurations and extensive testing of all of the USB Webcams in the last 8+ years. These are the baselines of my credentials....
My 4 day old 2020 Macbook Air 13" is brilliant...but i went to do a Video Call and I was gobsmacked at how poor the quality was. This is not my subjective opinion, as many of you have demonstrated, and I was told by Apple Support have said this is "EXPECTED BEHAVIOUR." I am very upset, as I checked and knew it was the "720p FaceTime HD camera" so was not expecting broadcast quality. I was expecting similar performance to 7yr old 2013 MacBook Air I was replacing - in the same way you'd expect relatively similar performance if you changed a 7yr old car...maybe a little quicker, but not 50-70% slower!
I have conducted a x3 way video conference call on Zoom and recorded it to show the comparative quality between a 2020 MacBook Air, 2013 MacBook Air and an iPhone XR. You need to view in full screen. The video quadrants are labelled with device names, but its clear quickly which is the newest device. https://vimeo.com/409222156
I am genuinely at a loss and sincerely hoping that this is a device driver setting/enhancement that is required...because, I cannot seriously consider that someone at Apple has intentionally chosen the piece of 5hit camera if it is hardware related...