However, I think it was a good video because it does an apples-to-apples comparison and clears up a misconception that many people have about buying. In part 2 of the video he sums it up pretty well "You are not a home owner until you have no debt. Until then, you are a paying rent on the money you owe instead of the place you live - you are a money-renter".
Evident from the comments here on HN as well as the blog post, many people mistakenly believe that monthly payment in a buying situation all goes towards equity or "savings". But after 30 years, the buyer would still owe $1M on the house - he hasn't saved any money at all. Reading some of the comments, it's almost scary that people about to spend a huge amount on a home don't understand this!