Finally he makes a solid case, citing lots of interesting research, for the idea that we humans "synthesize" happiness quite well in certain situations. It turns out that the more choice we have, and the more freedom we have to change our minds, the less happy we tend to be about our choices. On the other hand, the more we feel there is no turning back from a given choice, the happier we make ourselves with that choice. It appears that we have the ability to completely reprogram our innate preferences to match our reality.
Fascinating vid, I recommend!