WRONG! Youtube has switched to using the h.264 codec almost exclusively, especially for the higher quality videos. The HD streams and iPhone/iTouch compatible streams are not only using h.264, but they are also using the mp4 container, not flash at all! Instead the flash player and container have been updated to allow these changes. The "flash" codec Youtube used to use is rather disappearing.With the quality of Flash video constantly on the rise – now with it able to stream 720p streams over YouTube – it might only be a matter of time until Flash becomes the cross-platform codec of choice for all sorts of video delivery. Could the days of DivX, XviD, or even H.264 be numbered?