Adaptation Displacement: Incident in Lake County is a remake of The McPherson Tape, an indie horror film by the same director which saw a limited release in 1989.
Older Than They Think: This film pre-dates both The Blair Witch Project and M. Night Shyamalan's Signs. It isn't the originator of the 'found footage' genre though - that belongs to Cannibal Holocaust.
The film is regularly repeated in the UK, particularly on Sky Movies Horror - there's talking heads, but thankfully no narmy music. The last scene is particularly terrifying because there is no music, one can only imagine how it would be ruined by a soundtrack.