I have a vivid memory (I could have completely made up) that in the earliest trailers for Cloverfield that some o the footage was 'redacted' like soldiers faces were blacked out and voices changed. Either way I always thought that would be an incredibly creepy and immersive element for the genre - have parts maliciously and obviously left out.

Also, the whole promise of the found footage idea is why my biggest dream for movies is that someone makes a Navidson Record movie from the relevant portions of House of Leaves.