PornMD is a fairly new website which launched in 2013 as the central search engine for all of the tube sites owned by Manwin. Such tube sites are Pornhub, Tube8, Youporn, Extremetube, Keezmovies, Spankwire and Xtube. Surprisingly, Manwin doesn't own the adult porn site YouJizz. YouJizz is ranked in the top 1000 sites in the world and is an adult porn tube site much like Pornhub. All of the said tube sites got their idea from Youtube which became really popular back in 2005. It didn't take long for porn to clone the idea and allow website visitors the ability to upload porn.
PornMD is loved by many because of it's fast searching abilities and range of videos you get from all of the porn tube sites in the Manwin network of porn sites. As far as I can see, the only real distinction between all 8 of the tube sites in Manwin's network is Extremetube vs all of the other tube sites. The other tube sites being Pornhub, Youporn, etc which are mile mannered and have a wide range of fetishes and niches. Whereas, Extremetube majority videos shows rough sex and extreme type sex, hence the name Extremetube.
Hands down, PornMD has the largest network of porn videos but does quantity really supersede quality? I mean how many porn videos can really watch in 1 hour? Millions of porn videos are hosted on the Manwin network and terabyte after terabyte of bandwith is being consumed every minute, I guess people love the variety.