On the "You Tube Site" the Video Clip has been Edited just after it appears on the Screen, So I pulled out My Old 16 M.M. Film Copy of the Old Film that I have had From the Mid 1950s to take a Look. 
It Shows the object Going Back and Forth just Behind and to the Left of Duke's Head, and then becomes Two White Dots and then goes Behind Duke's Head and that is the Last Time You See Them !!!
Chilibill
First you must know what a U.F.O. is? As a Aerospace Engineer for over 50 years, I do know that there are U.F.O.s, Now What They Are is Somthing Else ? U.F.O. means Just that, somthing that You Do Not know what it is !
I do know that in the Early 1950 when I was flying B-29s and F-86s we had a Form that we had to Fill Out Each Time We Saw Somthing and Did Not Know What it Was? At this time it was a Super Secret Program called "Operation Bluebook!"
Remember this was Right In The Middle Of The Cold War and Just About Every One that was Flying at that time, were Seeing Things that they Did Not Know what it was ! 
Below is the Clip of that Shows "The Thing" or U.F.O. that look like Small White Specks Flying around Just to the Left Of Duke's Head and above the Stake Fence, at the Very First of the Film Clip.
Chilibill
