youporn is one of many video sharing sites in the gist of pornotube, redtube, xtube, xnxx, yuvutu etc. youporn seems to be one of the best.
Video performance is good, video quality tends to be excellent (basically standard MPEG4 via flash like all sites seems to use now). There’s a wide variety of content and navigation is pretty straight forward.
youporn stands out in that you can download content to your hard disk and it has a higher percentage of genuinely amateur content than most of them. They also have a fairly straight forward upload process and provide linkbacks.
A few other good home made porn sites: