The purposes of music videos-
Well the main purpose of music videos is to promote whether its a product, project, band, society and other things, for example “The ill mind of Hopsin 5” is a song about the lifestyle of today’s society.
Extension of income:
In short you get more money. When or if a song is used in an advert as a backing the band can receive royalties so if you add anther way I could be played you increase the playtime it has this increasing royalties.
Extension of outlets:
Play a song once > only the select few hear it
Play a song twice > more people hear it soooo the more it’s played the more people get to hear it meaning you get more of an audience and gain a following for what ever it is you’re promoting whether that be the band, a product or whatever.