The anonymous creator of the video comparing a future with Hillary Clinton as president to the world in George Orwell's '1984' is an ex-employee of a digital consulting firm with ties to rival candidate Sen. Barack Obama.
Philip de Vellis, a strategist with Blue State Digital, acknowledged that he was the creator of the video, which portrayed Clinton as a Big Brother figure and urged support for Obama's presidential campaign.
De Vellis said he resigned from the firm on Wednesday after he learned that he was about to be unmasked by liberal pundit Arianna Huffington on her Web site, HuffingtonPost.com.
He later posted his own lengthy admission and explanation on the Huffington site.
"I made the 'Vote Different' ad because I wanted to express my feelings about the Democratic primary, and because I wanted to show that an individual citizen can affect the process," de Vellis wrote.
"Let me be clear: I am a proud Democrat, and I always have been. I support Senator Obama. I hope he wins the primary. (I recognize that this ad is not his style of politics.)"
Blue State Digital designed Obama's Web site and one of the firm's founding members, Joe Rospars, took a leave from the company to work as Obama's director of new media.
De Vellis said he produced the ad on his home computer, uploaded it to YouTube and sent links out to various blogs. He said neither Blue State nor the Obama campaign was aware of his role in the ad, but he thought it best to resign.
"The specific point of the ad was that Obama represents a new kind of politics, and that Senator Clinton's 'conversation' is disingenuous. And the underlying point was that the old political machine no longer holds all the power," he added in his written admission.
In a statement released Wednesday evening, the Obama campaign said:
"The Obama campaign and its employees had no knowledge and had nothing to do with the creation of the ad. We were notified this evening by a vendor of ours, Blue State Digital, that an employee of the company had been involved in the making of this ad. Blue State Digital has separated ties with this individual and we have been assured he did no work on our campaign's account."
The Clinton campaign had no immediate comment.
Blue State Digital's Managing Director, Thomas Gensemer, released a statement Wednesday, saying that de Vellis had created the ad on his own time, and he had been "terminated" pursuant to company policy.
"It was done without the knowledge of management, and was in no way tied to his work at the firm or our formal engagement [on technology pursuits] with the Obama campaign," the statement read.
The ad's connection to the Obama camp could pose a public relations problem for the campaign. Obama has argued that he is a different type of presidential candidate who rejects negative politics.
The ad was guerrilla politics at its cleverest and had become the boffo hit of the YouTube Web site.
The 74-second clip, a copy of a 1984 Apple ad for its Macintosh computer, has recorded nearly 1.5 million views, with an enormous surge in the past two days. The video's final image reads "BarackObama.com."
De Vellis remained hidden for weeks, protected by the anonymity afforded by YouTube and the absence of federal regulations governing most Internet political speech.
The ad portrayed Clinton on a huge television screen addressing robotic humans in a stark, futuristic hall. A female athlete tosses a hammer at the screen, destroying Clinton's image with an explosive flash. Then this text: "On January 14th the Democratic primary will begin. And you will see why 2008 isn't going to be like '1984."'
De Vellis said he used footage of an updated Apple ad that portrayed the female athlete wearing an iPod. He said he used standard Apple equipment to modify the video and edit Clinton's image into the clip.
Obama, appearing on CNN's "Larry King Live" Monday night, said his campaign knew nothing about the origins of the anti-Clinton ad.
"Frankly, given what it looks like, we don't have the technical capacity to create something like this," he said. "It's pretty extraordinary."
FOXNews' Carl Cameron and Corbett Riner contributed to this report.