There is everything ... just everything
Everything you saw in your life or funny, surreal you can find there.
Clips of all songs, parodies of music videos.
Videos on how to do things, Channels of people just talking, showing all sorts of places, or make high prices on all sorts of places, or products, comparisons between two similar products of different companies, funny videos.
Anyone who wants to be known has to put himself in youtube, many artists began their way by uploading videos, some have shown a rare abilities that they have, talents or just a nifty idea, these ideas were token and made into advertisements for companies , there are others who started to sing and have gained fans and became famous singers , there is one who describes songs in pantomime, he got a corner in one of the tv programs in the United States to do what he does on TV.
After we understood that youtube helps us promote ourselves, in every possible way to show what we have to offer, all you need is an original idea or not just do it better and spread it, so that the video can get famous and will have alot of views and maybe can be spread through Facebook.
The whole thing is with the number of views, you can see which videos were viewed them most, there are also graphs that show how many views,in which days,which ages and from countries.
So make yourself an interesting video and turn it into the next big thing.