Well, this is very interesting.
The mic on the camera picks up some reasonably voluminous wind noise when pointed left but none at any other angle so it doesn’t support the wind theory much. Neither does the fact that the left swing is not doing anything at all.
The motion is quite consistent over the entire one minute nine second duration of the first video and the shorter second one, so, that also is not a plus for wind.
So, what’s happening?
A ghost? Some guy off-screen with a fishing line? Standing wave resonance? What?!
Curious minds want to know.
From LiveLeak does the ghost push the swing. Post text: “happened at village north Saudi Arabia.”