comScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released data from the comScore Video Metrix service showing that 170 million U.S. Internet users watched online video content in February for an average of 13.6 hours per viewer. The total U.S. Internet audience engaged in more than 5.0 billion viewing sessions during the course of the month.

The full version of the press release is available at: http://comscore.com/Press_Events/Press_Releases/2011/3/comScore_Releases_February_2011_U.S._Online_Video_Rankings Please let me know if you have any questions or would like to speak with an analyst.

Thank you, Stephanie Lyn Flosi comScore, Inc. press@comscore.com (312) 777-8801