More than 140 million Americans watched 10 billion online videos in December says a report from comscore Video Metrix. That’s about 72 videos per viewer. Video Metrix said the average video was 2.8 minutes. Over the course of a month the  average viewer spent three hours and twenty minutes enjoying this new habit that didn’t exist even three years ago.

Google sites had 43 percent of this new attention-getter, followed by Fox (23.9 percent) and Yahoo sites (20.8 percent).

Wired Magazine editor Nancy Miller calls this “Snack Culture.”

Lord only knows what Americans are snacking on, however, because comScore Video Metrix didn’t say.