Viral Video is video clips that are popular in all over the world through the Internet. It became popular thanks to Youtube, and it has spread by word of mouth. We can mainly watch short message videos. We don’t have to spend a lot of time to download them, and also, the cost of production is not so expensive. In addition, viral commercial is the commercial that we can see only on the Internet. It is said that viral commercial was begun from UK. Because we have less limitation on the Internet than television, we can watch more excessive commercials that cannot be broadcasted on television. There are a lot of web sites that introduce more than thousands of viral videos.