Tested on Ubuntu 20.04 and 22.04
Result 22.04
Does not even start in a Wayland session. unfortunate as Wayland is now standard on most Linux distr. Changing to X.org and the player works.
Result 20.04
20.04 deos not use Wayland, so no problem there but the scaling of the GUI window does not work. Making the default window bigger or maximising is just resulting in a bigger black filling between default size and selected size. Starting a video file, playback will be a correct full window size though