Automatical switch to specific source on detection of motion

Hello. I'm hoping someone may be able to point me in the right direction. I'm using an ATEM Mini Extreme ISO. I have a HDMI source coming into it that comes from an iPad with an app that randomly selects prize raffle numbers. My problem is that the selection process is very quick and it is easy to miss switching to that source in time. My question is - is there a software solution or macro script capability that would automatically select ONLY this source when 'movement' is detected in the frame? Any advice would be greatly appreciated.