ELI5: Explain Like I'm 5

Found footage (pseudo-documentary)

Found footage is a type of movie that looks like it was shot by people in the movie. It's called "found footage" because usually the video was found somewhere, like an old camera or a cell phone. The people in the movie will act like they are actually living the events on screen, like a real documentary. It's a way of making the movie seem more realistic and exciting.