Romney said that the documentary, which focuses on his two presidential runs and is offered on Netflix, would have been used as fodder while he was still running for president.
"Well I do know that if a film like that came out while I was running, it would have been attacked from the left, parodied from all the comics," he said. "It would not have gotten the kind of viewing that it obviously will get now."
He also said that people just don't have much time for the medium.
"Frankly most people don't have time to sit down and watch a one and a half hour film," he said.
Romney said that while the film would not have been "critical to my political success," he wished that voters had more of an opportunity to familiarize themselves with his background.
"It will make a lot of sense if people were able to spend a lot of time getting to know the candidates, if we spent more time at the convention broadcasting a great deal about their background, and if reporter dug into their personal history and who they interacted with," he said. "Those things would create a more full picture of the candidates."