The document discusses the forms and conventions used in hip-hop music videos to establish the genre. It notes that hip-hop videos typically feature materialistic and luxurious imagery like expensive jewelry, cars, houses, and drugs and alcohol to show the effects of wealth. They also sometimes include things related to crime like police, guns, or depictions of women being objectified through the male gaze to keep the primarily male audience engaged. The purpose of these conventions is to make it clear to viewers what genre of music they are watching without much thought.