The Beatles certainly didn't invent the music business, but like Beethoven, they had an undeniable steamroller effect that forced everyone to completely and permanently change nearly everything about the way the industry functioned. These items are not listed in any particular order of importance.
10
Music Video
http://www.youtube.com/watch?v=nDuRfaSdtO8
Although early jazz artists created short music-film performances of their songs, and Elvis filmed unique settings of his songs that were parts of movies, the Beatles were the pioneers of marrying the two ideas into the concept we now know as the music video - a short, stand-alone film of a musical act presenting a current song that may or not be a live performance.




