For the month of May, comScore reports that U.S. users watched over 12 billion videos over the Internet–a 45 percent increase in the number of videos viewed online a year ago. Not surprisingly, YouTube garnered the lion’s share with almost 35 percent of May’s videos viewed online–that’s roughly 4.1 billion YouTube videos watched just in the month of May.”Nearly 142 million U.S. Internet users watched an average of 85 videos per viewer in May. Google Sites [mostly from YouTube] also attracted the most viewers