October was a big month for Youtube. Online video viewership was at an all time high for the social video website. Youtube set a new record of 20 billion views for a single month. Basically that is a little less than 50% of all videos watched in the US. The video website is averaging more than 7 hours of video watching per user during the month--the highest engagement of all websites, whether Facebook or Hulu.
Top 10 Video Content Properties by Unique Viewers
Source: ComScore Video Metrix, November 28, 2011
Note: A video is defined as any streamed segment of audiovisual content, (both progressive downloads and live streams).