This document discusses the purposes and conventions of music videos. It begins by outlining several purposes of music videos, such as promoting songs, appealing to audiences, and generating revenue. It then examines Goodwin's conventions, including relationships between lyrics/music and visuals, as well as Frith's typologies of performance, narrative, and conceptual videos. Specific music video examples are provided for various genres to illustrate common conventions. The document provides a comprehensive overview of the rationale and stylistic elements of music videos.