US Internet users viewed 12.7 billion online videos during November 2008 alone, up more than one-third over November 2007, according to data released in January 2009 by comScore Video Metrix.

comScore said more than 146 million US Internet users watched an average of 87 videos per viewer in November 2008—that’s 77% of the total US Internet audience.

eMarketer also puts online video viewers at more than three-quarters of US Internet users, and estimates that percentage will rise to 88% by 2012.

eMarketer estimates online video ad spending will reach $4.6 billion in 2013, up from $587 million in 2008. Read more at www.emarketer.com