Music videos use codes and conventions to engage audiences. They follow patterns in areas like camera work, editing, and narrative or performance styles depending on the genre. These elements help audiences understand the structure and fit of a video with its song. Videos also use techniques like shot types, camera angles and movements, lighting, costumes, locations and colors to represent meanings and set a mood for the genre and lyrics. Overall, codes and conventions provide structure and consistency for audiences to understand and engage with different music video styles.