How to play TV "in game" not just in editor?

I have the problem of an mp4 file playing on a tv fine in the editor, but does not show up when playing the game. The mp4 file is in the correct folder “Content/Movies”
Does anyone know how to get this working?

Here is the blueprint i made below, i assumed this simple blueprint should make my mp4 file play in standalone game window.
I’ve also followed the instructions in this video exactly, but it doesn’t play the media texture in standalone game mode.