Come on Chappy, You are better than this. NOT Much, but a smidge better. We are seeing the same snippet over and over and over with a Zoom involved.
I don't recall seeing Jack Dougherty acting like a Jack in the box.... But whoever this man was he was very tall ...... He certainly fits Truly's description of Jack Dougherty
From the Jack Daugherty thread....Mr Scully supplies possible images of JD---- https://www.jfkassassinationforum.com/index.php/topic,1435.msg38636.html#msg38636
Looks like Bill Lovelady wearing a tee shirt to me. Don't see any nervousness or thought of hiding. Can't find any longer clip on the internet.