Unruly tracked the top 100 campaign videos, monitoring ads from the official Obama and Romney campaigns as well as ads from outside spending groups, such as the main super-PACs supporting each candidate.

About 40 percent of Romney's videos are shared online, compared to 60 percent of Obama's, according to Unruly. Romney gets more comments on his videos compared to Obama, at 56 to 44 percent. But the president's videos are shared more often online through blogs, Facebook, and especially Twitter, according to Unruly. About 84 percent of Obama's videos were shared through Twitter compared to 16 percent of Romney's, according to the chart. Romney keeps up better on Facebook, where most video sharing happens anyway, but Obama still leads there 57 to 43 percent in the past week. 

Obama has gotten the most shares over the past seven days from one of his ads attacking Romney for saying  “47 percent” of voters are “dependent on government" and won't vote for him. Romney's "47 percent" moment, revealed in a secretly filmed video from a private fundraiser in May, went viral on YouTube last week following its release. Views of Obama's videos jumped over the weekend with the popularity of videos hammering Romney for the "47 percent" remark and contributing to a big increase just since Friday in Obama video views compared to Romney's.

Romney's most popular ad on YouTube over the past seven days was "The Romney plan," according to Unruly. That video, released last week, actually has more views than the top video on the Democratic site, which was released around the same time.

Unruly plans to track the popularity of campaign videos until Election Day at its proprietary Election Tracker, updated twice daily.


Chart provided by Unruly.

Updated at 12:09 p.m.