Excellent video! Every tractor sales person should watch it, along with ever first time tractor owner/operator!
Here is one about how filled tires effect the tractor ...
I like a lot of weight on my tractors rear axle ... I have the ability to add 275 Lbs to the BH mounting frame if it's not on, for ground engaging equipment.
That comparison with rim guard in the rear tires and no 3 point ballast confirms what the other video claims. Loaded tires, while making the rear heavier and more stable, does not remove weight off the front axle.