The Steinway Mansion Site: Gone With The Wind (05:58) . . . And A Strange Unexplained Phenomenon [see captions below].

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At 02:59. For only one brief second, an eerie unexplained-for object drops out of the tree area at the extreme far left center of the frame and then quickly disappears.  Paranormal activity at the Steinway site?  What...or who?

For your consideration: the unexplained entity.  (Still imagery from above video.)

Back view of tree from which the unexplained-for object drops out of on the video.