comScore today released January 2010 data from the comScore Video Metrix service showing that nearly 173 million U.S. Internet users watched online video during the month. Highlights from the report below: ? The top video ad networks in terms of their actual reach delivered were: BrightRoll Video Network with 27.2 percent penetration of online video viewers, SpotXchange Video Ad Network with 19.8 percent, and Tremor Media Video Network with 16.6 percent. 135.4 million viewers watched 12.7 billion videos on YouTube.com (93.4 videos per viewer). The average Hulu viewer watched 23.5 videos, totaling 2.3 hours of videos per viewer. The duration of the average online video was 4.1 minutes. Top U.S. Online Video Content Properties* by Videos Viewed January 2010 Total U.S. – Home/Work/University Locations Source: comScore Video Metrix Property Videos (000) Share of Videos (%) Total Internet : Total Audience 32,410,886 100.0 Google Sites 12,816,043 39.5 Hulu 903,078 2.8 Microsoft Sites 491,753 1.5 Yahoo! Sites 435,487 1.3 Viacom Digital 361,228 1.1 Fox Interactive Media 293,008 0.9 Turner Network 283,244 0.9 AOL LLC 241,991 0.7 Vevo 226,125 0.7 CBS Interactive 217,407 0.7 Comments

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173 Million Internet Users Watched Online Video In January