Much has been made of the fact that Flash won’t work on the iPhone or iPod Touch. I was wondering how these two devices were playing YouTube videos since YouTube uses Flash technology to display videos on personal computers. After some googling, it turns out Google also converts uploaded video to the H.264 codec in addition to Flash video. Here are two links detailing the H.264 addition to YouTube:
YouTube goes H.264, Thanks to Apple.
YouTube Adding H.264 Format