Earlier this week, Steve Jobs kicked the debate about the need for Flash into high gear, especially for Web video. As he explained, Apple products like the iPhone and iPad don't support Flash because although 75 percent of video on the Web is in Flash " almost all this video is also available in a more modern format, H.264, and viewable on iPhones, iPods and iPads." The next day, Microsoft weighed in, saying that Internet Explorer 9 would only support the H.264 codec for HTML video. So how much video exactly is available in H.264?