My use case here is that I find Webex video distracting and the thumbnails make the presenter's screen smaller and harder to read. I don't ever want to see people sitting around in a conference room--I don't find it remotely interesting or useful. I do however want to see the presenter's screen.
I can make the presenter's screen larger by going into floating panel view, but then I have to collapse the panel and move it out of the way. This is a nuisance and ideally users would be able to do it with a single button on (for instance) the view menu.
The Show Participant Video option on the View menu does absolutely nothing for me.
This is on version 39.7.7.27.