Here is an example of a video that schools played.
Yes, here's one: https://www.youtube.com/watch?v=TL61EXDoRv8
The clip instructs the population to protect themselves by going to shelters, evacuation, and obtaining individual protection equipment. It also tells you how the shelters are built, how food is stored, how you can help prevent heavy casualties by housing workers of war industry outside of the city during wartime or evacuating them before the attack, what to take during evacuation.
Here's another video https://www.youtube.com/watch?v=J9-CJTyLtis that discusses the effects of nuclear bombs and various chemical or bacterial agents. This video also discusses reconnaissance of infected areas, treatment of those infected, and cleaning of infected areas.