http://www.techcrunch.com/2009/06/25/youtube-mobile-uploads-up-400-since-iphone-3gs-launch/

<<If there was any question about the significance of the iPhone 3GS’s impressive video functionality, here’s your answer: YouTube reports that in the six days since the iPhone 3GS was released last week, the number of mobile uploads has increased by a whopping 400%. For a single phone model to have such a major impact on the site is simply phenomenal.>>