it has done wonders for the sagging record industry. it has made overnight stars of rock groups whose records had been gathering dust. >> the first since 1978 business is finally up and the reason is music videos. ♪ >> we had no idea that music videos would have that much of an impact on the musical culture. it changed the entire dynamic of what you had to do as far as promotion was concerned. you had to be a performance artist as well as a musician. ♪