Those people were clearly coming to see some kind of a high value southern art and arrived in their best for such an occasoon. Oh boy-oh boy, what a weird day that was for most of them.
My favorite moment is at 0:50. That south Korean diplomat or whoever he is seems to be thinking, "gosh, this is gonna blow their minds," while the guy with the Kim Il-Sung pin looks like he's trying really hard to avoid restarting the Fatherland Liberation War.