2.) MTV became a symbol and “defined culture” in the mid-eighties. As a result, “popular music became more visual while dancing and clothing styles became more important.” The market was profitable and trendy and the videos in turn helped to boost album sales exponentially.
3. ) In some ways, music videos have become just as or sometimes even more important than the artwork due to the way we now consume music. A video connects an artist and a listener, as well as connecting a listener to an audience. In many ways, they are an important medium for contemporary pop culture and technology.
( I don't know what #1 is..)