This talk is about the new scientific computing langauge, Julia. It's presented as a series of Julia notebooks, which you can view online as HTML via the following links.
You can also download the notebook files and run them interactively using a Julia compute engine. To do this, either install Julia on your computer or log on to http://www.juliabox.com, and then start the notebook from the Julia prompt.
Or sit back on the couch and watch the the video from KITP!