I don't think it's a fraction of the data and resources needed to pull it off. But if I were, say, Kim Jong Un, this video might give me enough of a sense of ho

I don't think it's a fraction of the data and resources needed to pull it off. But if I were, say, Kim Jong Un, this video might give me enough of a sense of how many people, time, and budget I might reasonably allocate for this kind of project. That's not the kind of information that I'd likely get from Scientific American; also, even if I can find a blown-up schematic of a nuclear weapon in a magazine, no matter how detailed it is, I'll never be sure that some important "secret sauce" isn't left out of the image. Seeing hi-res footage of a real device is different in that regard.