Embedded Ads In Videos? Does Such a Service Exist?

Hey everyone,
I’m working on a new site where videos will be my main form of content and the reason for traffic to the site. I’m confident that the site will be successful money-wise with Adsense clicks and CJ affiliates but I’m wondering about something else…
I’ll have all these original videos up on my site, I feel like they could be doing more for me. Does a service exist where an advertisement clip is played at the beginning of videos and the publisher gets paid every time someone watches one?
If this doesn’t exist, maybe it should.

Original post by barrow