Here’s some footage from a French documentary that takes a look at Heath Ledger’s diary during the filming of The Dark Knight. In the video, Heath’s father Kim Ledger, flips through a few pages and recalls how his son locked himself in a hotel room for weeks to prepare for the role of Joker.
Syncopy Films made this (that’s the production company founded by Christopher Nolan).
GIZMODO – Watch This Behind the Scenes Clip of The Dark Knight’s Bat from Gizmodo on Vimeo. Gizmodo just posted this video of some behind the scenes footage of a real life-sized Bat in the filming of The Dark Knight.