1) The trailer is for the horror film "Insidious Chapter 2" and promotes a supernatural story of a family whose home is terrorized by an evil spirit possessing the father. 2) Various scenes from the trailer use music, camerawork, and on-screen text to set an atmosphere of tension, fear, and a looming threat to the family by contrasting happiness with darkness and danger. 3) Quick cuts, scary imagery, and loud sounds in the latter half of the trailer work to startle and adrenalize the audience in order to attract their interest in the film's secret and what the evil spirit wants.