HD is not a codec. It's just the same as SD with the same codecs, just with higher resolution. A 1920x1080 movie is HD whether it's MPEG-2, MPEG-4, H.264 or WMV9.
I went to the Windows Media WMV-HD clips site and I'm quite sure that WMP-9 for the Mac doesn't use the codec. The video was playing back very slowly on a dual processor 2GHZ.
If the codec for the movie was unavailable, it wouldn't play back at all. If it plays at all, you've got the codec. The fact that it plays slowly just reflects the fact that macWMP sucks ballz.
Also any good sites that anyone can refer for HD content?
The compression technologies available today don't make HDTV content reasonable to host online without throwing a lot of money at it. There are probably a few sites, but there won't be many and I don't know what they are.
Is the H.264 in QT 6.5?
No.
The easiest way to get HDTV content to watch is to subscribe to HDTV service from your cable company, and ask them for a receiver with a firewire connection (which they are obligated by law to provide as part of the service, for your DVHS needs). Then go to
http://macpvr.home.comcast.net/ and get the modified (from Apple sample code) AVCBrowser to let your mac download the content from your cable box.
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