Priority
The display priority is as follows.

Scroll surface Collision You can set collisions for pictures, animations, and movies.
Collision is used to determine the hit with the cursor, and you can set the processing to be performed when the pad, top / bottom / left / right, A, B, C, or START button is pressed. For example, you can specify that if the A button is pressed, it will branch to another video.

Below is a brief description of each object.

MPEG video
Display destination: Direct surface, sprite surface, scroll surface
Display size: Horizontal: 16-352 (multiple of 16)
Vertical: 16-240 (multiple of 16)
Number of display colors: 16 million colors (direct surface)
32,000 colors (for sprite and scroll surfaces)

Cinepak video
There are no restrictions.