Warcraft 3 Cinematics play, but not fullscreen

I am running Warcraft III (ROC + TFT with patch 1.27b) via Bottles (Flatpak v 51.6).
By default (and it was expected), the cinematics don’t play well (only the sound, with a black box the size of the video, aligned to the top left of the screen)

I have installed the following dependencies: “l3codecx” and “lavfilters741” on my bottle, and the videos play fine, but still not fullscreen. It’s on the top-left of my screen.
Is there a settings somewhere (or other dependency) that might fix that ?