FWIW (not much).

He was describing an aileron roll. An aileron roll uses no rudder..raise nose a few degrees and then max deflection as it comes around. Nose will fall through horizon.

A SLOW roll uses rudder as the airplane rolls around a point as the wings lose lift at 90 deg. A slow roll/aileron roll become the same thing in a high rate AC ie Pitts/edge/extra/mx/fighter. With a 720 deg/sec roll rate the nose won't come off its point at full deflection rudder or not.

Barrel roll..1g constant and looks different than both although closer to typical aileron roll.