What exactly he has there is not clear. That the object doesn't continue across the face of the moon, could be the light of a star/planet just behind the moon (And near the edge) getting "bent" due to the mass of the moon's "gravitational-lens".
...As the moon progresses in it's orbit...that would be obscured and would have only momentarily been in view, perhaps giving the impression the the object had decended or "landed".
Very interesting, none the less, Thanks for posting it!
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