The phrase "to introduce the film" means to give a brief presentation or talk before the film begins, providing some information and context about the movie for the audience. Full definition
Quentin Tarantino, whose Rolling Thunder division of Miramax is distributing the film, said in introducing the film at UCLA last June, «No film spoke to me... in the past year like Chungking Express.» (themoviereport.com)
Festival director Jennifer Morris, when introducing the film, claimed this was the funniest lesbian feature ever made. (sensesofcinema.com)
It opens with Hitchcock introducing the film in a manner we can recognise from television's classic Alfred Hitchcock Presents following a murder that will play into the story in a pretty dramatic (and also cheeky) way. (eclipsemagazine.com)