Eh, I always dislike watching (or for that matter reading) short summaries like this, because I keep wanting to say, "Well, no not quiet..." or "It's not as simple as that..." and "But then what should you do...". I guess this isn't a bad way to may be get someone interested in the topic, but you have to be clear that "this isn't all there is, you need to go find more information yourself".
This is the first of two trailers for the book 'You Are Not So Smart', by David McRaney.
You will know why I posted it when you watch it, very relevant.
Thinking about thinking is the key.