ComScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released data from the comScore Video Metrix service showing that 181.9 million Americans watched 38.8 billion online content videos in April, while the number of video ad views reached an all-time high at 13.2 billion.

Top 10 Video Content Properties by Unique Viewers

Google Sites, driven primarily by video viewing at YouTube.com, ranked as the top online video content property in April with 154.6 million unique viewers, followed by Facebook with 627 million, VEVO with 52.9 million, NDN with 45.3 million, and Yahoo! Sites with 45.1 million. Nearly 39 billion video content views occurred during the month, with Google Sites generating the highest number at 13.0 billion and Facebook reaching an all-time high once again with 740.8 million. Google Sites had the highest average engagement among the top ten properties.

Top 10 Video Ad Properties by Video Ads Viewed

Americans viewed a record 13.3 billion video ads in April, with Google Sites ranking first with 2.4 billion ads. BrightRoll Platform came in second with 2.2 billion, followed by LiveRail.com with 1.7 billion, Adap.tv with 1.5 billion and Hulu with 1.4 billion. Time spent watching video ads totaled 5.1 billion minutes, with BrightRoll Platform delivering the highest duration of video ads at 1.1 billion minutes. Video ads reached 53 percent of the total U.S. population an average of 82 times during the month. Hulu delivered the highest frequency of video ads to its viewers with an average of 63.

Other notable findings from April 2013 include:

• 84.7 percent of the U.S. Internet audience viewed online video.
• The duration of the average online content video was 5.6 minutes, while the average online video ad was 0.4 minutes.
• Video ads accounted for 25.5 percent of all videos viewed and 2.3 percent of all minutes spent viewing video online.

via comScore Releases April 2013 U.S. Online Video Rankings – comScore, Inc.