The document discusses the effectiveness of combining a main film product with ancillary texts like posters and radio trailers. It states that all ancillary products must be of high quality and consistent in style to clearly link them to the film. The radio trailer is analyzed and found to effectively reflect the film's intentions of creating tension and discussion through its use of dialogue, sound effects, and music from the film. Synergy across products is also discussed, with an example given of how the film title, font, and colors are identically used in the poster and radio trailer to clearly connect them all to the same film.