comScore latest Video Metrix data reports that 175 million U.S. Internet users watched online video content in Sep. for an average of 14.4 hours per viewer. "Google Sites, driven primarily by video viewing at YouTube.com, ranked as the top online video content property with 144.2 million unique viewers. Yahoo! Sites captured #2 spot with 54.4, followed by Facebook.com with 52.2. Microsoft Sites jumped 3 positions in Sep., securing fourth place with 45.5 million viewers.
Google Sites had the highest number of overall viewing sessions with 1.9 billion and average time spent per viewer at 260 minutes, or 4.3 hours.