Good evening, everyone.
I found both videos very interesting. While they both explain the effects of nuclear bombs, their interpretations are quite different. The first video combines science and horror to depict nuclear bombs as the end to life and infrastructure for seven miles. The second video reminds me of "Duck and Cover"[1], except a tad more mature. Both techniques are "brainwashing" in the sense to bring the public to polarity.
The first video seems more realistic. While the tone is a bit extreme, the science involved makes the effects more convincing. Of course a nuclear bomb is dangerous -- why else were shelters built? The second video makes a nuclear bomb sound like something you can live through, by ducking under a table before, and washing thoroughly after. (If you even survive, that is.)