By Seth Weintraub
April 13, 2011

That nearest competitor is now AOL, which is one-third its size.

The latest comScore Internet video numbers published today show Google (GOOG) and its YouTube subsidiary out in front in visitors sessions and minutes per viewer.

Google Sites had the highest number of viewing sessions as it neared the 2 billion mark, and highest time spent per viewer at 276 minutes, or 4.6 hours.

Back of napkin math shows that 82% of U.S. online video viewers watch Google/YouTube and more than a third of the almost 6 billion viewing sessions are Google’s.

YouTube also blows away everyone, including Hulu, in terms of minutes watched per user and accounts for a third of all video measured by time watched.

But it may even be more lopsided than that.

Interestingly, No. 2 AOL (AOL) recently signed a five year deal with Google that included licensing its video technology.  Also, VEVO has a huge content sharing deal with YouTube in place.   Most of Vevo’s videos are actually watched on YouTube.

Google is also planning to turn out much more video with $100 million devoted to building its own premium content and its recently announced YouTube Live channel.

Unfortunately, it isn’t certain how comScore takes these joint ventures into consideration but either way, it show’s Google’s influence is even stronger than the big numbers it puts up.

More on Fortune.com

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