This vid was very popular over the summer. It's very peculiar because you wouldn't expect that voice to come out of that young man and he has interesting mannerisms. I'm sure I'll sound like your grandmother when I say this, but it's refreshing to see a young person doing something creative and unique with his talent.
It was so popular, other people on YouTube parodied it. My favorite is Chad Vader's version.
Now, you can find promos for the Comedy Central Last Laugh '07 for it using the same fellow. And, Dr. Pepper had the same idea, but much more elaborately done/over the top than Comedy Central's.