There are many including the one pornhub is based on "clip-share", they claim they are no longer based on it hahahah thats just hilarious. Im sure they just made a few modifications, bug fixes and enhancements. Give credit where credit is due.
Cliphouse is really nice, just like youtube.
http://www.dzoic.com/demo.php?product=ch
Out of the box clip-share and others like Rayzz (What my site is based on) are pretty buggy and not built for high volume so be prepared to hire some coders to optimize mysql and php coding.
My site Naughty Tube is now built like a tank but this is after 6 months of optimization and feature adding. Knock on wood.