Hi,

I am guessing you already exposed your Holographic screen's video to Aximmetry with the Get Aximmetry Video blueprint node: https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/obtaining-graphics-and-virtual-assets/creating-content/creating-content-for-aximmetry-de/passing-data-from-aximmetry-de-to-unreal-engine/#get-aximmetry-video 

And now you want to expose this to a Control Board: https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/scripting-in-aximmetry/flow-editor/special-compound-control-board/

You could use the
[Common_Studio]:Compounds\Overlays\Overlays_Vid_Ins_Logo_Crawl_Green.xcomp compound to do so. This is actually more than you want, but it is a good starting point that you can customize to your needs.
The Overlays compound uses Video Switch Buttons in pin collectors to make nice control board panels, where you can drag and drop videos: https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/scripting-in-aximmetry/flow-editor/special-compound-pin-collector/#add-a-video-image-switch-to-the-control-board 

Warmest regards,