The North Korea part begins around the one-minute mark. Chang and Bechtol think North Korea is unstable, but they may know something I don’t. I agree that the turnover seems to have been high lately—and some of that can be sourced to North Korean sources, for whatever that’s worth—but I just don’t have confidence that we really know the facts. If it is true, however, turnover sounds more like a sign of instability than a sign of consolidation.
There’s also some good discussion about North Korea’s growing military threat.