Dan - thanks for the video. Did you have center stage on or off? If seems like you had it off, and it looks like Apple lowered the angle of the camera so that it shows more of your head/body in non-center stage mode?
My number one complaint with the Studio Display is in non-center stage mode, it only shows the top of my head and positions it at the bottom of the frame. It's really, really aggravating. I have to angle/tilt the display all the way down just to look semi-normal.
Apple care today advised me that "the camera in non-center stage mode was designed to point straight ahead and that my head being positioned at the bottom of the frame was 'normal' ". Hoping they've fixed this! Thanks!