That is an interesting idea! It could detect the borders of the screen, straighten and auto crop, perhaps detect and match the frames per second… if the camera resolution is high enough you could maybe even detect the original source resolution.
Which is getting scarily good. I realised this a couple of days ago shooting food photos, realising the color balance and saturation were way off, but that that was because in real time the camera app had recognised the subject as food.
(I'm probably way late in becoming aware of this. It still simultaneously 1) blew my mind, 2) annoyed me, and 3) terrified me.)