A film distributor is responsible for marketing and distributing a film onto various platforms like DVD, Blu-Ray, and streaming services. The document discusses choosing Summit Entertainment as the distributor for a film based on similarities to films they had distributed previously like Twilight, Divergent, and The Hunger Games in terms of target age group, genres of action and thriller, and BBFC age rating of 12A. By including the Summit Entertainment logo at the start of the film, its association with the distributor is made explicit to viewers.