NUKES: What Happens When A City Is Nuked?

In just 8 minutes this excellent video by Kurzgesagt outlines the effects of a nuclear blast on a major city in easy to understand terms.

Each phase of the destruction process is explained clearly and concisely, offering a very efficient education on the basics of nuclear catastrophe. Quality graphics and a pleasant sounding narrator create a somewhat jarring conflict between a fun tone describing the worst possible end of a major metropolitan area.