As for me,
http://www.tube-erotique.com primary purpose is internal traffic generation for all of my concepts. All of my sponsors on Digitaldivasonline.com have direct say as to the length of video, etc. I do not allow my users to embed, download or do any other stuff like that.
I also re encode by hand all of the video, so that the birate and sizes and everything else is highest preview quality possible.
Of course, with me, everything is underconstruction, blah. but by the end of this year, the good seeds that I have planted, will be ready for the next level.