YouTube is a website where you can upload videos where fifteen people will watch it every month. It has many high quality channels such as PewDiePie, Smosh... uh, nigahiga... YouTube also has many horrible channels with lame content that nobody likes such as Jacksfilms, Senor Pacman, uh, Evan's Trash... pfft. All garbage. Fuck those guys.
YouTube is owned by Google so it's connected with your Google account. Having an account on a website has never been more complicated.