This is one great propaganda piece! While nuclear war is horrific, it is not 'UNSERVIVABLE'!
The basics are about right, but the figures have to be listened to and evaluated. Indeed any city attacked would cease to exist, but not all people live in cities and in reality city dwellers with and ounce of sense would 'bug out'. The fallout scenario would depend on many variables, ground burst impacts would result in some sort of 'nuclear winter scenario', however most warheads burst at high altitude, for strategic reasons. The whole scenario is one of mutual destruction, however, many people would survive a worst case scenario, that said they would have to be well informed people with a good level of preparation. This accurate in only one way-it fails to accept the variables although it does acknowledge they do exist.