I’m very, very late to the party on this one, but this is a great jQuery plugin from CSS guru Chris Coyier and the web design shop Paravel. If you dig fluid width video embeds – something becoming fairly essential with modern responsive design – it’s worth giving this plugin a look. I recently incorporated FitVids.js into an experimental Tumblr theme I’m working on as a side project. Worked great and implementation was straightforward.