Found footage is a horror movie genre that has always teetered on the line between fact and fiction, using techniques like handheld cameras and unscripted dialogue to add an extra level of authenticity to the film. Horror films like The Blair Witch Project and Cannibal Holocaust proved how convincing the concept of found footage can be, leading their audiences to believe the events seen on screen actually happened. A subgenre of found footage known as mockumentaries are made in the style of a documentary and analyze a fictitious person or event using "personal recorded footage" and "interviews" as a means to tell their stories.
Source：https://www.cbr.com/must-watch-mockumentary-horror-movies/
