Genre research into short films - mockumentary

When researching short films I've been trying to decide upon a genre for my short film. I'd quite like to do a mockumentary I find they are one of the most amusing genres for short films if done well.
One of these in particular was "The Crusader" as seen below

This is about a man who believes that he is Batman and he is trying to sue Warner Bros. for misrepresentation.