Music videos serve several purposes including promoting a single, artist, or album. They entertain audiences and help set the meaning of songs through visual imagery. Typically lasting 3-4 minutes, music videos combine live performance, narrative elements, and visuals like computer graphics. They often feature performances by the artist, tell a narrative story related to the song lyrics, or focus on a conceptual theme, symbolism, or idea. Concept videos emphasize artistic visual style over narrative or performance and may break conventions of film editing.