Research: Amplification, Disjuncture and Illustration

Amplification:
Occurs when the videos introduce new meanings that do not contradict with the lyrics but adds layer of meaning.
Justin Timberlake - Cry me a river

Disjuncture:

This is where there is a little connection between the lyric and video or where the video contradicts the lyric.
Usher - OMG


Illustration:
The video tells the story of the lyric. Dance is often used to express the moods in the song.
Jay-Z|Alicia Keys - Empire state of mind