Here are probably biggest adult tube sites where you can also upload videos.

http://pornhub.com
http://tube8.com
http://xhamster.com
http://camhotgirls.com
http://xtube.com
http://youporn.com
http://ziporn.com
http://spankwire.com
http://pornotube.com
http://megarotic.com
http://maxporn.com
http://boysfood.com
http://redtube.com
http://camelstyle.net
http://badjojo.com
http://hardsextube.com
http://heaven666.org
http://tnaflix.com

Source http://porntubesites.blogspot.com/