If you schmucks thought all that Americans do is get their breasts augmented, penises enlarged and skins tanned, you’d be so wrong.

Americans have a different obsession – online videos.

In April alone, Americans watched 16.8 billion online videos, an increase of 16% over the prior month.

Must be something in the water here. Because we spend a lot of time too watching Bollywood and Tamil videos.

According to the comScore Video Metrix report for April, the average U.S. viewer watched 6.4 hours of online video during April.

Of course, Google’s YouTube was again the top U.S. video destination with 6.8 billion videos viewed (40.7% online video market share), a 15% increase over March.

Here are some of the other highlights from the comScore April 2009 report:

* Nearly 152 million U.S. Internet users watched an average of 111 videos per viewer in April

* 78.6% of the total U.S. Internet audience viewed online video

* The average online video viewer watched 385 minutes of video, or 6.4 hours

* 107.1 million viewers watched 6.8 billion videos on YouTube.com (63.5 videos per viewer)

* 49 million viewers watched 387 million videos on MySpace.com (7.9 videos per viewer)

* Hulu accounted for 2.4% of videos viewed, but 4.2% of all minutes spent watching online video

* Duration of the average online video was 3.5 minutes

High broadband penetration, easy availability of cheap PCs and the zero cost of most online videos are some of the key reasons Americans spend so much time viewing videos.

Bet ya a billion dollars that most online videos were viewed alone and a significant chunk of the videos were porn.