Grave Encounters

Grave Encounters is a 2011 Canadian found footage supernatural horror film written and directed by the Vicious Brothers. The film stars Sean Rogerson, Ashleigh Gryzko, Merwin Mondesir, Mackenzie Gray, and Juan Riedinger as the crew of a successful paranormal reality television series who lock themselves in a supposedly haunted psychiatric hospital to search for evidence of paranormal activity as they shoot what ends up becoming the series' final episode.

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

Poster © the film's rights holders.