From the beginning of the 2011-2012 U.S. Presidential election campaign in April 2011, there have nearly 2 billion views of videos tagged about Barack Obama or Mitt Romney on YouTube, Ramya Raghavan of YouTube Politics blogged today. Of those, just about 100 million views are of official videos made by all of the presidential campaigns, including the other Republican primary contenders. That is, just 5% of the total views of videos about the American presidential candidates is official media, as opposed to user-generated content. Back in 2008, the ratio by the end of the election was 10%, or 150 million views out of 1.5 billion, according to data from TubeMogul and Divinity Metrics, that looked solely at videos containing either Barack Obama...