Zoom is a photo opportunity for us cats. We don't have to rely on our humans to video us and put us on the net. We just pop into view in our own time.
Top of the screen appearances are the best way to upstage your human (see above). Just cover his face with your own, making it impossible for other humans to see him properly.
Less useful but easier to arrange is the simple stroll across the screen, ending in the always amusing butt photo. The display of a gorgeously furry backside always gets human attention.
Or simply closely stare at the camera taking up the foreground leaving your human in the background.
The most widely enjoyed Zoom cat appearances was, alas, not the result of a real cat but merely a Zoom filter. An amazing court case occurred in the USA in front of judge Roy Ferguson, where somehow one of the lawyers' profile was taken over by a feline face mocking his utterances. Despite the warning on the Zoom screen, this went viral and even has its own wikipedia entry - https://en.wikipedia.org/wiki/Zoom_Cat_Lawyer
So, fellow feline artists, start refining your Zoom technique.