We classify our DVD's exactly as we do our books. If it is a biography, we place it DB. This makes it so much easier to find items for our customers.
Alma, since the first line of a call number is the type of media--we would use as our call number for the DVD you mentioned as:
We also classify all DVDs as we would books.
What about a movie on the life of Jesus? Such as the movie "Risen". Would you call that Fiction, or would it go under 232?