But Mr. Huntsman’s campaign, which struggled to raise money for expensive television ads, put many of his harshest attacks against Mr. Romney into clever and biting online videos that he posted to his campaign’s Web site and a corresponding YouTube channel.
Those videos (and a few television commercials) are now mostly gone, quickly yanked from public view as Mr. Huntsman prepares for an 11 a.m. endorsement of Mr. Romney.
A spokesman for the campaign, who asked not to be identified, said only that “we’ve removed a substantial amount of content from the Web, as campaigns often do when they end.”
But what was notable about Mr. Huntsman’s actions was the speed with which his operation moved.
It was also notable for the impact it very quickly had on news Web sites and blogs. Because many sites — including The New York Times — regularly embed videos hosted by campaigns directly on their Web sites, the Huntsman videos on those sites vanished, too.
That could provide an object lesson for news organizations hoping to create a permanent record of the back-and-forth of a campaign. If they want the videos to last, they must host them on their own servers.
But just in case, there’s always the other party — in this case, the Democrats — who will be eager to remind the public what was once there.
At 11:33 p.m. Sunday, the Democratic National Committee’s Rapid Response unit sent out a long list of Mr. Huntsman’s most vitriolic comments about Mr. Romney — lest anyone forget.