The parent is pointing out functionality that only pops up for explicit screensharing -- changing your camera to a screen grab won't trigger these. In particul

The parent is pointing out functionality that only pops up for explicit screensharing -- changing your camera to a screen grab won't trigger these. In particular, one I've found very useful with Zoom is being able to zoom in to a small region and scroll around. I also suspect Zoom prioritized resolution (for content clarity) over frame rate for screen sharing, which probably doesn't apply when it's just a "webcam" in the eyes of the client. I'm guessing your window capture would get decimated in terms of quality.