Almhouses in Haarlem

In cinema, a making-of - also known as behind-the-scenes - is a documentary film that features the production of a film or television program.
Feature length documentaries on the making of other films has become a film genre in its own right.
The making-of film may ultimately be more important than the film itself. Shorter making of documentaries are often used as a bonus on DVDs, as it offers more insight into the film, how it was made, and to credit the film crew.