The document discusses the origins and types of music videos. It begins by explaining that modern music videos originated as a marketing tool to promote music recordings. It then describes four common types of music videos: performance videos that film a live show; narrative videos that tell a story; symbolic videos that represent lyrics through symbolism; and "notion of looking" videos that show the audience viewing something. The document also outlines some typical codes and conventions for music videos, such as editing techniques, camerawork, and aspects of mise-en-scene like props, costumes and location.