After watching the vid a second time, one theme appeared to be "control energy". They did not explain this concept. Have been flying for 39 years now and it is a new one for me, perhaps it means FLY CORRECT AIRSPEED. Who knows.
Except for broken aircraft or really freaky weather (both rare) loss of control on takeoff, climb and in the circuit occurs due to insufficient airspeed or insufficient control input, it really is that simple.