YouTube, a very popular name all along the world as eight out of ten people in the world surf this site, purpose for surfing may be different. It is may be to watch their favorite songs or to watch video tutorials. It is basically related to watch videos may be its songs, may be any tutorial or something. You must have watched a number of videos available on YouTube too but one at a time. But you can watch a number of videos on YouTube simultaneously at a single time. There are a number of websites that provides tools to watch multiple videos at a single time.