Doesn't look like the webcams are in HD.

"In order to conserve internet bandwidth and to assure that our global networks are being utilized the best during these unprecedented times,
we have been required to lower the quality of videos during Zoom Meetings hosted on your desktop or mobile device.

Fortunately, standard video capabilities will still remain in place. That's why the resolution is at that quality right now.

No worries, we'll make sure to get it back to HD as soon we are permitted to do it. That's something we can guarantee!"