hulu-video-ad-viewsHulu receives only 18% of the views of the online video behemoth that is YouTube (the exact numbers are 26,193,000 visitors to 142,720,000), but the on-demand streaming video destination for premium TV shows and movies delivers a helluva lot more ads.

According to the latest comScore numbers, Hulu delivered a total of 470 million minutes(!) of video ads in the month of April. That’s roughly 7.8 million days(!) and 21,461 years(!) worth of online video advertising. I would like to tell you how many millions of minutes of ads YouTube delivered last month, too, but whatever YouTube’s video ad numbers were, they don’t make comScore’s Top 10 list.

That 470 million minutes from Hulu may seem like an eternity, but it’s actually a 9% drop from March when the site delivered 520 million minutes of video advertising. At least part of the decline is due to a 5% or so decline in unique viewers of content on Hulu, from 27.5 million last month to 26.1 million in April.

Unique viewers of video on Facebook also dipped down 4% for the month of April, while AOL slip is numbers was far more severe. Unique video viewers to the online portal fell 30% month over month, from 57 million in March to 40.1 million in April. Vevo climbed up to take the #2 spot form AOL, while YouTube/Google Sites are still on top with 142.7 million uniqe viewers. That’s almost three times the numbers from Vevo, its closest competitor.