In the video it appears the king pin and plate are raising up off the turn table. Also it appears that you are not using a Nylon lube disc. One of those will dampen the noise of the king pin plate coming back down on the turn table. And I would choose a different route. Also try to get pin weight higher. Also you could try towing in alt ride height on the RAM air suspension.
You are not running 80 lbs inflation in the rear dual tires on the TV are you? Setting the inflation to match the light load might help, the 65 lbs inflation for the duals is based on 9750 weight rating of the rear axle.
6500 on the rear axle only needs about 37.5 lbs inflation per tire for the load you are hauling. Try 40-50 lbs inflation in the rear tires. That provides 6900 to 8160 capacity on the rear axle.
https://commercial.firestone.com/co...015/FS_TBR_load-inflation-tables_web_2014.pdf
So to put a bow on it. Lower inflation on TV rear tires and get a Nylon lube plate!
BTW run 80 lbs in the TV front tires all the time. And have toe in set to 1/32" not the factory 1/4" to fix tire wear issues on the new RAM duallies.
Chris