turbomaxxx

I have a startup.mp4 in my video folder and i can’t for the life of me change the aspect to 4:3. i know it uses vlc as the player but i dont know how to force it to 4:3. I even tried converting a video to 4:3 in another program but it still doesn't work. I have everything else working great. Any advice is appreciated. Remember this is just for the startup video, i know how to force theme to 4:3