"You've got this" eh? No, NO ONE has got this. Ask the ground-zero residents of Hiroshima or Nagasaki.... oh wait, they were all vaporized weren't they? The only safe distance from a nuclear attack is a few hundred miles, and even then if you're unlucky and the prevailing winds are in your direction, you're still going to get sick and die.... and if you're NOT in the direct path of the winds, crops will be unsafe to eat and you'll die.... and the irradiated landscape will offer very little in the way of sustaining life afterward and you'll be trying to survive in a Mad Max world where every other survivor will be out for his / her own survival.

So yeah, that rosy little "don't worry, be happy" video is useless propaganda in the Dr. Strangelove vein of "How I Learned to Stop Worrying and Love the Bomb."