My impression was that this video was trying to emphasize the point that the rudder is a very effective flight control surface, especially at high angle of attack. The reason he was emphasizing this was the 737 hard over rudder deflection on approach in Colorado. I thought his whole point was that the pilot in that situation increased the AOA thereby making the rudder more effective and dooming the flight, where as had he accepted altitude loss, less AOA, and more airspeed, he may have been able to recover.

IMHO I thought it was an interesting discussion about unusual attitudes and how rudder, as a last resort, could be an effective way of recovering an airplane that could not be recovered using aileron only.

I don't think his discussion applies to the wake turbulence situation in this thread, and I don't think he was trying to advocate using rudder in less than very extreme situations, but that it could be very important to understand exactly how rudder use could help or hurt you in these extreme situations.

I think this statement is true in normal situations, but if we don't at least talk about (like in the video) how the rudder effects flight in other situations, then the lack of understanding, that may have contributed to the AB accident, will surely continue.