Despite being a film composed of "found footage," several scenes in the film are scored in the typical horror movie fashion (screeching violins, thumping bass, acoustic guitars). This would presumably be absent from a collection of footage showing such disturbing events, and obviously could not have been added in post production by the characters.
At 9:51, there is a shot of a newspaper article about the death of an autistic boy. The article is in three columns. Half way down the third column, the article repeats, starting from the beginning again.