Some really great ideas and observations here, I especially favor the Necromancy concept that Spartan Ken discusses. The bones would then be a residual effect of corpses finally breaking down despite the dark magic holding them together. Still, despite the power of the Traveller; how terra-formed is the moon exactly? Other than some weird quick bouncing strides by the Hunter running in the first part of the video - the moon looks like it's normal vacuum prone self. If there is no real atmosphere, then degradation could not occur, especial in the absence of moisture and micro-organisms. Several movies and video games (Dead Rising) have examined undead/zombie groups functioning as a 'hive minded' colony. That would play neatly into the Necromantic origin. In a completely random observation, the abomination at the end reminded me of the Undead home city in Azeroth (World of Warcraft reference)... where chained abominations were kept as a last line of defense in case of a ground invasion... cheezy, I know.