HTML5 media not supported in Windows 8?

Here's something weird - I have the Big Five browsers installed in Windows 8 Consumer Preview for various testing... And I've noticed that Safari 5.1.4 is completely missing its support for audio and video. I am basing this on the use of the html5test.com tests. Sometimes, the testing website has flaked out a bit, but on other platforms, Safari gets its currently correct score.
Any thoughts? Bug with Safari since Windows 8 is a pre-release? If anything, I guess this is a heads up for now.

I had this problem also... turned out that Safari uses QuickTime to support HTML5 audio/video, and I did not have it installed.  Once I installed QuickTime on Windows 8, the native audio and video elements worked fine.

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