The document discusses how a media group's thriller film trailer used and challenged conventions of the genre. They analyzed 15-20 thriller films like Insidious and Orphan to understand typical conventions like protagonists, antagonists, close-up shots, scare shots, fade ins/outs, jump cuts, and tense soundtracks. Their trailer used some conventions like flashbacks, jump cuts, fast pacing, scene transitions, dialogue, credits, and shots. However, they did not want to give too much of the story away or confuse viewers, so they kept it simple and did not fully challenge conventions by maintaining an unclear narrative like typical trailers.