The wyze cam beta in full screen sets the video to cover, which shows the video… but with the top and bottom cut off dependent on the users viewport/screen resolution. I wrote a tampermonkey script that will fix this for now… but i would suggest that in full screen mode the user has options for how the fit is presented.
For anyone who wants to view the entire video in full screen mode, this simple script just adds a simple css block that adjusts how the video is rendered in fullscreen mode.