That's a pretty crappy site.
Single video pages allow you another chance to deliver ads and it also creates a larger footprint in SE's. They also allow for "related videos" and "random videos" sections that would further entice the viewer.
Having so much flash loading on the page at once makes the page very bloated. If the page lags when you scroll, then that's a good indicator that there's a bit too much on there.
Yeah, I don't see any links or banners that link to the content owner, and instead the site depends on upsells to dating and webcams. No scene titles or descriptions which could lend to SEO goals.
Yeah, it's a pretty crappy site.