Another month, another comScore report for Online Video viewing (in the US)… this it’s all about March numbers and yet again records have been broken.

Here are the main stats:

181 million U.S. Internet users watched online video during March;

– which represented 83.5 percent of the U.S. Internet audience;

– they watched nearly 37 billion videos;

– in general, the average viewer watched 21.7 hours of video;

– the duration of the average online content video was 6.4 minutes, while the average online video ad was 0.4 minutes;

– and this is where it hits an all-time high: 8.3 billion video ads were watched in March;

– time spent watching video ads totaled 3.5 billion minutes;

– video ads reached 51 percent of the total U.S. population an average of 53 times during the month;

video ads accounted for 18.5 percent of all videos viewed and 1.5 percent of all minutes spent viewing video online;

Pretty impressive numbers and food for thought isn’t it?

It’s no surprise by now that Google Sites (Youtube) drive the majority of video viewing, ranking at first place with 146.1 million unique viewers, followed by Yahoo! Sites with 60.6 million, VEVO with 51.3 million, and with 45.1 million. While Hulu isn’t that high in that list, it is second in time spent watching video, with 4.6 hours (Youtube is first with 7.1 hours), and when it comes to video ads watched, it is still king too, with Google/Youtube second.

The insights to take from this monthly report are that video watching in general seems to be at a consistent point, but the number of video ads amongst all video is growing.

We will get a better picture for this year as more reports come (not just from the US too), but so far, it’s looking pretty good for online video!

Check the full report, here.