Adventures in Pornoland (2008)

Largely improvised with only two people privy to the "secret" - that a fictional movie was being made using the players, crew, and settings of the adult movie industry as its background. Canadian television director Ethan dreams of making it big in Hollywood. It's hard finding work, so he takes a job in the porn business to make money. Much to his fiancée's chagrin, Ethan ends up enjoying the industry more than he'd expected.