Nearly 75 percent of US internet users watched an average of 158 minutes of online video in May, with Google sites topping the monthly rankings with both the most unique video streamers and the most videos streamed, according to the comScore Video Metrix report for May 2007, reports MarketingCharts.

According to comScore's video-related data for May:

• Americans viewed more than 8.3 billion video streams online, and Google sites accounted for 1.8 billion of those videos streamed (21.5 percent share of streams); 1.7 billion of Google's streams were via YouTube.com.
• Fox Interactive Media ranked second with 680 million streams (8.1 percent), followed by Yahoo sites with 387 million (4.6 percent) and Viacom Digital with 237 million (2.8 percent).

• In total, nearly 132 million Americans viewed online streaming video in May.
• Google sites also captured the largest streaming video audience with more than 64.9 million unique streamers, followed by Fox Interactive Media with 52.7 million and Yahoo sites with 35.0 million.

• Online viewers watched an average of 158 minutes of streaming video per streamer.
• The average video stream duration was 2.5 minutes.
• Nearly three out of four (74.3 percent) US internet users streamed video online.
• More than one out of three (35 percent) US internet users streamed video on YouTube.com.
• The average online video viewer consumed 63 video streams, or more than two per day.