When I choose the fullscreen mode option the video player gets stuck and wont revert to project window. Tried F8, Exit fullscreen mode, ALT +TAB, updated NVIDIA graphics driver. Updating to 8.0.30 didnt help either.
I’ve had a similar problem. The Escape key does nothing, right click does nothing. For me, F8 would turn off the video window but I could only bring it back fullscreen.
The solution for me was to double click on the video image itself. This works as a toggle to go between fullscreen and your previous video size. It’s the kind of thing you’ll feel like you’ve tried already, but try again and make sure.