Painful to watch. Do you have a lower gear to run in? When lot of hay comes to either side of the pickup it jams easier. I assume the pickup tines aren't hitting the ground. You might want to check/tighten/replace the belt driving the pickup. I did that on my AP 41 and the pickup got "stronger". Though it doesn't mean you get to drive through too much anyway as the forwarder rakes (?) that pushes it to the side will have their shear pins (regular bolts actually) sheared. Remember it's the smallest baler in their lineup at the time - it's not a high capacity one.
i would say from my hearing he has the right rpm ,and i cant see he is overfeeding her. As you might know you have to run it at 540pto rpm. Not more not less. The Ground is quite rough as i see so when you set the pickup too low it will stop quite a lot.