Carol Vernallis' theory discusses three key aspects of music videos: 1) Narratives in music videos loosely follow the lyrics of songs through disjointed visuals that show parts of a story without a clear conclusion. 2) Editing in music videos breaks traditional continuity rules by making cuts noticeable and sync with the beat of the song. 3) Camera work in music videos uses shots like close-ups and establishing shots that are framed and move in ways influenced by the music's beat.