YouTube will opt-in all existing videos (over 8mins) for mid-roll ads
youtube.com
youtube.com
To be honest, I think this will go over very poorly. Once content becomes inundated with ads, we tend to just move on to something less intrusive. I'm not sure if views will drop, but there's a massive economy at stake here and media is a far more fragile ecosystem than most think.
Is Google still sharing revenue from the ad money?