@reply to comment: Use Modernizr to help fix up and detect browser support. If the browser doesn't support it then use an alternative. aka for video player if there is no support for video use a silverlight player in its place.
@Darick:For this you would need to create your own bundle. It's an interesting idea but since /css and /js work on any folder how/where would we know to exclude them from the bundle? I think the best bet would to be to recommend your own CSS bundle. One for screen and one for print. The other option would be to use the @Media inside of the style sheet to say that is for print but that only works on newer browsers.