Niesen is reporting that during September 2011, there were 164.4 million unique U.S. video viewers who streamed nearly 18 billion videos.
That comes to almost 5 hours of time spent on average watching.
According to Nielsen report, YouTube was the top online video site with 126.466 million unique visitors. Vevo was second top site with 39,484 unique visitors.
Facebook at number four recorded 31.226 million unique visitors.
In top online video sites, YouTube streamed 10.2 billion videos across the the mulitple devices and locations. Hulu at number two position streamed 618,704 million videos.
Viewers who spent the most time on the online video sites -- Netfilix was the top site, viewers in the U.S. spent an avearage of 10 hours watching video contents o Netflix across multiple devices.
YouTubers spent 2.52 hours on watching video online, reports Nielsen.