This uses the new <video> tag in the HTML5 spec, but only supports browsers which implement the H264 codec.
Two interesting bits. First, this is great news for anyone on a platform where Flash is either unavailable (like iPhone) or where performance is terrible (like Mac and Linux). Second, there is a debate about the HTML5 spec’s video codec, as it supports video in Ogg Theora or in H264. Safari and Chrome support the H264 codec, while Firefox and Opera support Ogg Theora. But this player only supports the H264 codec. I wonder if other sites will follow suit, and implement a de-facto standard based on H264.