Online voting at MittRomney.com will "help" select the winner of the contest, according to the campaign. The submission period ends on Sept. 17, with the ad set to run during the week of Sept. 20.
Entrants get to create their own spots by remixing or "mashing up" campaign-supplied photos, videos and audio clips, as well as their own content. Ads must be either 27 or 57 seconds long to make room "for those much-loved legal disclaimers." The campaign says the winner will be the first amateur ever to have his or her work used as an official TV ad for a Presidential campaign.
Yahoo acquired Jumpcut, which is officially still in beta, last October.