Well, it is difficult, because for a media player, you need to have a correct video stack, (which means X11, DRI, mesa, OpenGL etc...) and a correct audio stack

Well, it is difficult, because for a media player, you need to have a correct video stack, (which means X11, DRI, mesa, OpenGL etc...) and a correct audio stack (which means pulseaudio) and those are quite hard to ship in a cross platform way. If you look at the Snap packages of VLC, a LARGE part is not VLC at all, but this graphic stack.