Change page background to video

how I change the whole page background to video
Wix Studio Editor

What are you trying to achieve:
change page background to video

What have you already tried:
css codes
manual edit

Additional information:
I change from business wix to wix studio which is better to construction field that need customize design and bookings services

You can only select a color for the page background. But you can change a sections background to a video in the right side inspector panel. Depending on the design you can set the section to be the full page size. Or yuo could add it to a container and set the size to suit.