The document discusses ancillary products such as CD covers, magazines, and billboard posters that are used to promote artists and their music. Ancillary products work together with music videos by using recurring visual themes to establish the genre of music. Codes and conventions are expectations for how different media products should look and the content they should contain. These codes help audiences identify and develop tastes for similar media products. The document also notes that the student will be creating a digipack and magazine advertisement as ancillary products for their music video and will analyze the codes and conventions used.