Play it in the theater projector and enter the movie through the screen
Movie Theater, in the toilet stall in the restrooms (Easy/Normal) Behind the seats in the showing room (Hard)
Silent Hill: Downpour
"The Silent Children" Film Reel is an item required for the "Cinéma Vérité"sidequest in Silent Hill: Downpour. It is one of three film reels used with the theater projector so that the player may enter the movie through the screen. Depending on the puzzle difficulty, the film reel can be found in two different locations in the Chastain Heights Cinema.
There are two different locations it can be in, dependent on difficulty:
On Easy and Normal mode, the reel can be found in a toilet stall in the restroom.
On Hard mode, the reel can be found behind some seats in the showing room.