This is probably a genuine unknown, but given its location and what has been happening in North Korea lately, we could be looking at some sort of monitoring device that is waiting for North Korea to detonate a nuclear weapon underground, after the failure of the missile launch. Still, it’s a good video and as it resolves into a group of lights toward the end, it becomes quite mysterious.

Story Source:
http://www.youtube.com/watch?v=3pYR2jWdVGA