In the 1980's there was the launch of MTV and the different individual music channels which focused on different genres of music. These allowed bands and artists to promote their new single with a new music video and also allowed them to get their music out to a wide audience.
In the 1990's and 2000's the internet was being used more and more to help promote music videos. Bands would upload their videos to social networking sites such as Myspace and Facebook and would also upload them onto YouTube where they know a large amount of their fan base checks and updates regularly. Interactive music videos are also being used more and more as the bands and artists can get closer to their fans and the fans feel more included in the music, making them want to continue to listen and buy the albums. You can also now buy tracks and watch videos online by just clicking a link. Websites such as YouTube can now connect with music distributors such as iTunes and Amazon to allow consumers to buy the music quickly and easily.