I am guessing he doesn't have to write code on a whiteboard.

Damn, I always thought interviews of guys like him went along these lines: https://www.youtube.com/watch?v=XUhsNIeIgpY

I think they don't even have to explicitly show attitude like in the video you shared. Their past accomplishments in managing complex systems and projects can more than speak for themselves. :)

This looked like a pretty idiotic advise for the most part.

But how will they know if he can invert a binary tree?

Well, he still has one: http://nondot.org/sabre/Resume.html

When he tweeted about leaving Tesla, he got about sixteen billion replies from people asking him to come work for them.