Video Background Support for 5" Turx Screen

Is your feature request related to a problem? If so, please describe the problem.
The Stock UsbMonitor.exe etc allows you to set a video background to your screen, see here:

https://streamable.com/y4x1qj

Describe the feature / solution to your problem you'd like
Would like to be able to set video backgrounds as well as zoom level and offest movement of the background video.
Watch this first: https://streamable.com/qepm3g
Followed by: https://streamable.com/rekg4l

Tried to combine into one clip but avidemux said now.#

Describe alternatives you've considered / and or tested
A description of any alternative solutions or features you've considered.

Screenshots / photos & mockups of the Turing screen
Add screenshots or photos/mockups of the rendering on the Turing screen to help explain your request.
You can drag and drop photos here to add them to the description.

Environment:
3.0.0
w11 22h2 22621.1848

Additional context
Add any other context or screenshots about the feature request here.

The issue names no files, tests, or entry points. Start by reviewing the existing screen-background and video-rendering implementation, then compare its behavior with the linked examples. Done should include video backgrounds on the 5" Turx screen with configurable zoom and offset movement.