Yes, I understand the video is meant to be funny, so maybe I'm over reacting just a wee bit when I find it to be insulting that "one book" can cure a bad DM or a bad campaign. Not to mention that I find the caricature of the bad DM here truly insulting.
Yes, it's over the top, but so were the 4e videos trashing gnomes. Insulting your user base for a few laughs seems counterproductive to my way of thinking.
Eh, maybe I am over thinking.
Maybe it's just a funny video and not meant to sell anything.
(hat tip to +Benoist Poiré )