Showing one Person's Video in Group Meeting

StevenC365 Thanks for the response, but I don't have a Teams meeting going on at the moment so I can't test that (I don't recall seeing a Help button in the interface but I'll look for one during the next meeting). However, in the case of a video embedded in Teams Chat stream, when I click on that, it opens in Microsoft Stream (in its own separate window) and there are no apparent controls other than pause/play, volume, playback speed quality, and maximize/minimize. When I click maximize, the video takes up the whole screen BUT it's still divided into four sectors and that's the problem--I want only the upper left quadrant (the one with the presenter) to fill the screen. Also, do you know if there's a way to download a video recording of a Teams meeting as an MP4 or other accessible video format? There's a "download" link but nothing happens when I click that and it says "expires in 14 days"... Thanks again.