Americans' appetite for Web video, from clips shared on YouTube to TV programs and movies, continues to soar, nearly doubling since 2006, according to a report from the Pew Internet & American Life Project released Wednesday.

"The audience for online video-sharing sites like YouTube and Google Video continues to grow swiftly across all demographic groups, far outpacing the adoption rates of many other Internet activities," Pew said. "Fully 62 percent of adult Internet users have watched a video on these sites, up from 33 percent" in December 2006, when Pew last measured such activity.