AI Model Than can detect phones/cameras for android

I'm working on movies/videos app ( like netflix ) i alredy prevented users from taking screenshot , but i wana to add extra feature for my app that users "AI Model" to detecting if the user is recording the screen from another phone or camera

So Simply required is an AI Model Than can detect phones/cameras
And i also wana it less than 5MB size

Please comment this project with
1 - you final cost
2 - model size
3 - technology you will use