MoviePlayer not scaling

Good afternoon.

On Windows. Trying to play a movie.

The window properly moves to fullScreen (it’s for a kiosk like app). The player also then fills the window.

The movie, however, plays in a little box in the middle.

Any clues?

Update: For this project I’m on 2017 2.1.

Works on Mac does not work on Windows. It’s the same project.