Not only is Martin Scorsese’s audio commentary provided on the 2-disc “Gangs of New York” DVD a reason to give the movie a second chance, but it’s the reason to buy it.

Scorsese’s prose is similar to hearing a Supreme Court case. Two minutes in, I was completely lost in this film scholar’s inspirations and references to old movies.

Bits of Scorsese’s movie genius aside, his insights on casting of leads Leonardo DiCaprio (Robert De Niro suggested him to Scorsese), Cameron Diaz (she grilled him to let her audition) and Daniel Day-Lewis alone highlight his exploration of making this multiple Oscar-nominated film.

Speaking of Day-Lewis, you won’t take your eyes off of him in a role that makes Adrien Brody’s performance in “The Pianist” look like leftovers.

To dismiss “Gangs of New York” as an overdrawn, bloody demonstration of a director’s indulgence would be to forget the pure marvel this movie is.

Though as shaky as DiCaprio’s Irish accent, it’s still a film that emotes a definitive movie-making ambition.

— Ryan Curell