Youtube for SEO

OK some say you should not use Youtube for getting links. However, one of my web sites get over 50% of its traffic via Youtube. In fact, Youtube is a traffic magnet and it is interactive. The big problem is that it does not pass PR to your pages. Rather instead you pass PR to it. This could be a problem for SEO, but I find Youtube an XLent source of clicks and comments. Also, I can talk face to face with my audience and not pay for hosting the videos. All in all, it is very win win.