If you don't have Silverlight installed or have no desire to install it, I hate to say it, but: this keynote probably isn't in your wheelhouse.
That not withstanding, the quality of Silverlight streaming video is actually quite good.
That not withstanding, the quality of Silverlight streaming video is actually quite good.
That said, being it mostly video (I assume), there is very little reason not to show it through a standard video tag. Heck... Even TVs can handle that nowadays.