Never taught to use "full rudder", except to enter and recover from a fully developed spin. What we did practice was using rudder to prevent a wing drop/yaw at the critical angle of attack. Ie; climb to appropriate height, reduce power, stick neutral/full aft and then dance on the rudders to keep the wings level in the stall as the aircraft rapidly lost altitude. Unload stick to break the stall and recover - all without entering the incipient spin stage. I learnt this during PPL and again during Aero training.
If anything, that video shows rudder can be quite effective at "picking up a wing"!