The comScore Video Metrix service shows that 171 million US internet users watched online video content in January for an average of 14.5 hours per viewer. The total US internet audience engaged in nearly 4.9 billion viewing sessions during the course of the month.
As usual, Google sites, driven primarily by video viewing at YouTube.com, ranked as the top online video content property in January with 144.1 million unique viewers. Vevo was the runner-up with 51.0 million viewers, followed by Yahoo! sites with 48.7 million viewers.
Viacom Digital took the fourth position with 48.1 million viewers, while AOL drew 44.5 million viewers. Google sites had the highest number of viewing sessions with 1.9 billion, and average time spent per viewer at 283 minutes, or 4.7 hours.
Americans viewed more than 4.3 billion video ads in January, with Hulu generating the highest number of video ad impressions at nearly 1.1 billion. Tremor Media Video Network ranked second overall (and highest among video ad networks) with 503.7 million ad views, followed by ADAP.TV (432 million) and Microsoft sites (415 million).
Time spent watching videos ads totaled 1.7 billion minutes during the month, with Hulu streaming the largest duration at 434 million minutes. Video ads reached 45% of the total US population an average of 32 times during the month. Hulu delivered the highest frequency of video ads to its viewers with an average of 44.6 over the course of the month.