After uploading three viral videos to YouTube, the publisher of Chad Kultgen's novel The Average American Male had to go back to press three times in the first month.
Here are links to the other two videos:
http://www.youtube.com/watch?v=5WSczMVN6ns
http://www.youtube.com/watch?v=FMFoAvnzxl4
For more such success stories, see http://www.tenmillioneyeballs.com.