paper cut out app explanation

I have seen some tutorials and presentations for apps, that use paper cut outs. something like https://videohive.net/item/paper-cut-out-promo/4700370 but using real paper cut outs, and fingers moving the paper shapes [not digitally created as in link]

but right now i need to find real examples, of software/phone apps, explained with paper cut outs.

Where can I find examples of this? what is the name of the technique?

thanks!