So, the Ethan Hass puzzles are apparently completely unrelated to the Cloverfield/1-18-08 film. They are linked to Paramount it seems, as Paramount have had clips from the game pages pulled from...
Choose from small, medium and large normal-definition Quicktime or 480p, 720p and 1080p high defintion. The file is called 1-18-08. Just like I think the film is. Don't you?