That is one stout looking BX and an excellant video.
But did you subsol that area first? At that last turn it didn't seem like the disk was cutting that much in the virgin soil. Just wonder if the disks are to light, didn't have them turned in enough, etc?
As far as the hydro, I have a gear but with the hst don't you have to keep your foot on a pedal at all times? One thing I love about geared tractors is I can get it going then put my feet anywhere I want. I don't have to hold on to anything but the steering wheel.