The document discusses conventions used in film trailers and posters to promote media productions. It describes how the author's trailer and promotional materials for a film follow conventions like using key plot moments out of order, including release date and production company at the end of the trailer, and using titles to introduce clips. The poster features the main character and production details against a backdrop relating to the plot. Challenges to conventions include combining genres of action, thriller and sci-fi and portraying the main character as potentially a "false protagonist".