Agree with everything India 42 has said. The stick appears to be fairly well aft with increasing back pressure throughout. Not sure whether the engine faltering has anything to with it or does this aircraft require constant pressure on the throttle?-and why the pilot let's go of the stick as he releases the rope.
Does this aircraft have a trimmer/ is it capable of being trimmed for the tow? It is also in important to be trimmed correctly so that any need for backpressure is noted immediately. Looks like he has back pressure from early on.
As a tug pilot the whole thing looks like something I have no desire to try.