If a smile is an indicator of happiness, the person being interviewed (a high income economist?) in the video doesn't smile at all! Is he not serving evidence against his own words?
Common sense tells us money can't buy you happiness beyond a certain point. But economists are not famed for possessing common sense. They would like to run a regression on the GDP to figure that out.
Just focus on being smart, you have a long long way to go....and leave the happiness business to normal folks.
Reminds me: "Economists are people who are too smart for their own good and not smart enough for anyone else's."