Digging Up the Marrow

Digging up the Marrow is a 2014 American independent mockumentary found footage comedy horror film written and directed by Adam Green. It stars Green as a fictionalized version of himself who, in the process of making a documentary about monsters, is contacted by a man, played by Ray Wise, who insists that he can prove monsters are real.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.