The document discusses conventions of movie posters and trailers. It provides guidance on constructing an effective horror film trailer, including using fast cuts to build tension, low camera angles to make the audience feel vulnerable, and close-ups to build empathy for the main character. Color schemes, imagery, and unsettling sounds and music should be used to set an ominous tone. While revealing some hints about the plot, an effective trailer will also raise questions to intrigue the audience. Feedback on a draft trailer suggests making edits to better follow trailer conventions and more clearly portray the plot and psychological thriller genre.