Success of adult home video websites like Kinclip, Redtube, Youporn, Xclip are merely one aspect of a wider cultural phenomenon.
Providers of adult content are thriving on the Internet. Varity, type, and methods, of content provided can range widely. Whether it is pictures, DVD Films, fantasy stories, or amateur videos, there can be no doubt as to the demand from the Internet using public.
All such adult content providers are merely catering to the diverse and colorful sexuality in wider culture. To deny that would be hypocritical. Courts have rightly held that most of adult content should be free of regulation.
Internet and associated technology has merely been the conduits to deliver such content to a greater audience at a lesser cost. This reduction in cost and ability to cater to worldwide audience has allowed the providers to cater to niche markets with targeted fetish content, such as those targeting voyeurism. Due to the technology and the fact that most of such content is created by amateurs the cost has come down so low that most sites do not charge from users but depend on the advertisements for their revenue. Sometime they share the revenue with the amateur content providers.
In other words, success of Kinclip.com, Xtube.com, Redtube.com, Youporn.com, xclip.tv, and other such adult home video sites are the result of both aggregation of niche demand and improving technology.