That site comes up as 404 for me. I'm not really too keen on overlay advertising anyway. I would find it to be annoying myself, and think most others would too. I post roll is much better, especially since YouTube has people trained to look at the end of a video for more goodies.

I know this can't be impossible. I see that the social media script has it built into the admin panel to manage commercials as a standard feature. But I really don't want to spend $300 on that script if it's not necessary, and I certainly dont want to go redoing my site now that I'm finally getting good traffic.