A very large, mainstream site that allows people to upload and view other people's videos. This is one of the main video streaming sites, so much so that videos found on other websites are commonly "powered" by this site.
This too is a very large, mainstream site, and has been growing exponentially in recent years. It is a site for displaying, using, and selling various forms of art and applications.
As the creator is based in Britain, this site is a bit more obscure. Features a guy named Steward Ashen who reviews a variety of items, ranging from food to knock-off videogame consoles.