There are many conventions that is linked with music videos such as :
* Quick shots
* Lip syncing
*Costume Changes
*Makes it Clear If its Group or solo artist
*Montage Editing - This conventions is quite popular in music videos as the editing of the music video doesn't have to flow for eg. an artist could throw a ball and the next shot could be him dancing. As where if it was continuity editing you will have to see the ball travel in the next shot.
*3-4 minutes long