How about the link to your video then.
Lets have a look at what you problem was.
I know that I have tried to make my Hensley create or exaggerate sway and can not do it. I have gone out with my unit loaded as it is when head out on a trip, I have tried panic stops from 60MPH and evasive maneuvers, the Hensley never allowed the TT to do anything but follow the TV.
I still say that this so called Hensley bump is due entirely to strut bars needing to be adjusted. Every stop and every mornings pre-trip I grab the strut bars and give them a tug, if there is any play, that means I need to give them a quarter turn to snug them.
