Amplification is where the song is some how related to the song through a lyric but is also layered with a deeper meaning or a message which is trying to be conveyed my the artist
In the song paradise by Coldplay the artist relates back to the song with parts of it being set in a location which some would perceive as paradise relating back to the song how ever its layered with a deeper meaning possibly talking about captivity with the elephant behind bars.
Disjuncture is where the video in no way is related to the song in anyway at all usually leaving the audience confused on what is going on in the video as it has no relevance to song at all !!