A movie trailer is a short promotional video that showcases highlights from an upcoming film. Typically lasting between one to three minutes, trailers aim to generate excitement and interest among potential viewers. They often include key scenes, music, and voiceovers to convey the film's tone and storyline. Trailers are usually released several months before a movie's premiere and can be found in theaters, on television, and online platforms. They serve as a marketing tool for filmmakers and studios, helping to build anticipation and encourage audiences to watch the full movie upon its release.