YouTube is the most well known video-sharing website in the world. The founder are Steve Chen, Chad Hurley, Jawed Karim, later they sold Youtube to Google for 1.65 billion US dollar. The company is based in San Bruno, California, and uses Adobe Flash Video and HTML5 technology to display a wide variety of user-generated video content. The videos are movie clips, TV clips, music video, video blog, interactive video movies, movie trailers and other creative motion picture contents. Individual users are the group that uploaded most of the contents on YouTube. However, media corporations such as CBS, BBC, VEVO, Hulu, and other organizations are the group that uploaded copyright contents such as music video, movie clips, and documentation. If a user uploads a copyright video, He or she will be notified by YouTube and the company will take the video down. YouTube continues growing and it is one of the best channels for social network. Many users become YouTube partner to gain profit from their contents.