I agree. These are a great BBQ 101 series. Anything to promote BBQ I'm all for. I don't think the pound of butter is such a big deal, all the butter would have melted out to the bottom in minutes and he uses for other stuff.
Honestly, the most surprising thing to me is that he appears to not be using a charcoal grate in the firebox. I would figure that would not lend itself to a very efficient fire sitting on top of ashes all the time but what do I know...