I dunno, I liked the video. Lot of things you may never need, but still, its working with your weapon, practicing with it. Spitting in a shell might not be such a great skill, but every time you draw up on a target, you improve a little bit. The before and after video he takes is clearly evidence of that.
Also, using your firearm as a weapon, not to be under estimated. Its a heavy, its long, and if struck with is going to cause some pain. Like he said, sometimes (especially here in Canada,) your less likely to be arrested if you strike the home invader with your firearm, than if you had shot him.