Cool video effect

I am looking for help with a presentation concept. I want to present a concept using a webcam created video of a person - close up. The trick is I want this person to be able to pick up pieces of paper, and hold them up. Later I want to be able to superimpose the content I desire such as video over the paper, and make it look like the piece of paper the presenter picks up is made of video, like a kind of harry potter newspaper effect. All I want for now, at this stage is for someone to create the effect for me, so i can see it done. And then we can work on the actual video in a seperate private project. Thanks ## Deliverables no more to add here