This is a brilliant use of YouTube for two reasons:
1. He’s offering his audience to record their stories of botched medical procedures or other problems with the medical system in the US and he will then (somehow) get members of Congress to watch them. So he’s using YouTube as another form of activism which proves that although most of the web may indeed be porn, gaming and emo kids, like any other tool it is what you make it.
2. This is a much smarter way to promote his new film SICKO. Instead of saying “hey promote my film”, he’s saying “hey help me change the medical system”. This is very Marketing 2.0.