How doestThe trailer behave in everyday life?
To be clear, I haven't attached a wiring harness so therefore cannot trailer, technically. I have only attached a bike rack.
Does it move/swibg fully loaded eg. 4bikes (200lbs)?
It is remarkably stable with 3 bikes installed. There is very little side to side motion and also very little back and forth when properly secured, but this is all largely dependent on the rack you choose, and not so much on the hitch. Unfortunatley, none of our bikes even come close to 50 lbs, so I wouldn't be able to test as large weight as you noted.
Do you mind making a video with your bike rack mounted and drive a few miles to see how it behaves in everyday situations?
Unfortunately, with my current equipment, I wouldn't be able to safely make one that was high enough quality. I suggest checking out etrailer for the specific rack you're interested in. They have a ton of great videos for different racks, and the 2 inch receiver on the bolt behaves similarly to the 2 inch receivers you'll see there.