If you open that in VLC, it plays fine.
Here's the relevant HTML:
<video id="movie" class=" video" src="http://qthttp.apple.com.edgesuite.net/129opiygabsdvibsdfobsd... x-webkit-airplay="allow" autohref="true" width="848" height="480" jsonurl="/apple-events/scripts/ac_media_jsons/september_2012_event.json" expectingmoviejson="true" spec="" style="width: 848px; height: 480px; "></video>
Here is a list of clients that support HTTP Live Streaming: http://en.wikipedia.org/wiki/HTTP_Live_Streaming#Clients
But its referencing some QuickTime playlist, with a bunch of extra magic attributes. That shit is not one inch better than <embed>.
Why is it that just about every company on the planet can happily stream video to me, but the only ones who seem to consistently fail at it are technology companies?
The nice thing about standards is that there are so many to choose from.
Working fine in my browser.