You-tube video about a simulated nuclear war?

There was this video on You-Tube, a mock up of what it would be like to experience a nuclear war in the happening. It started with hearing the announcement, then the siren's would start up. It had a prompt stating what would be happening as it went along, such as radio broadcasts on specific frequencies, to the actual impact of the missiles and the explosion. It was supposed to be made as a realistic scenario simulation, so there aren't any flashy pictures or any sound other than that befitting the stage of the situation.

Thanks in advance.