Mockingbird

Mockingbird is a 2014 American found footage horror film written and directed by Bryan Bertino, from a story by Bertino and Sam Esmail. The movie was released to video on demand on October 7, 2014, and was given a DVD and Blu-ray release on October 21 of the same year. It features Todd Stashwick, Alexandra Lydon, and Barak Hardley as three people that have been given video cameras with the instructions to film their daily activities for a strange contest.

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

Poster © the film's rights holders.