Same rules as the video game one. You ask a yes or no movie related question, and you have 20 questions to narrow it down. Only one "title" guess (guessing the name of the movie) per person, per round, so save it until you're pretty sure.
The other guessee rule is they have to be "Hollywood" releases (no obscure foreign releases, limited indie releases which 5 people have actually seen, etc.). I know this is a bit subjective. Just use your best judgement.