Checking this out on Wikipedia, I was surprised by how many sites I'd heard of weren't using H.264, but VP6 instead, I'm guessing for royalty reasons that don't apply to the big pockets of Google:<p><a href="http://en.wikipedia.org/wiki/Comparison_of_video_services#Streaming_Video_Technical_Information" rel="nofollow">http://en.wikipedia.org/wiki/Comparison_of_video_services#St...</a>