For those who don't speak German, this translates to "Do they know what zone they live in?" Still utterly confused as to what's going on, I did a little bit more investigation. According to one commenter, the film highlights the risk associated with a nuclear accident. This is given credence by the map on the webpage which appears to show how far the effects of a nuclear accident would reach.
Whether or not this can be considered explicitly horror is up to you; the combination of sudden death and a resulting post apocalyptic scenario with the incredibly haunting music certainly lends itself to the genre. It's then made all the more frightening due to the perceived reality of the situation. Give it a look and decide for yourself. If you can read German or have the desire to translate all of it in an online translator, please enlighten us.

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