I have been a new user of youtube. It has been an amazing experience to use youtube as it is very useful for all. In short we can call it as Library of videos. We can watch all type of videos including that of songs, reality shows and movies.
There are both positive and negative sides of it. Youtube allows you to learn technology as well by sitting in one place and able to know the step by step process of any technology. If we dont know anything we can view it as video in youtube.