Cant' get out of full screen video

I pressed F8 to display the video window and chose full screen. Now I can only close or open the video window (F8) - there’s no option to choose one of the other resolutions. There was before I pressed full screen. Right mouse or escape doesn’t do it. It’s a normal MP4 file.
How do I get out of fullscreen video ?

EDIT - a restart got me out of fullscreen mode.