I think that the last video actually describes Nicolas's older system where after initial engagement the rheostat was then wound up feeding more power to the small motor and increasing rpm. This new system appears to eliminate this by having a programmed system that does that automatically.
As described, it is a booster system and when you begin moving forward the airflow up though the disc rpm is enhanced/boosted by the electric motor. I had a prototype which when it was working was good. Sadly the man initially working with Nicolas on it left, together with hardware/ infortmation that caused some unfortunately long delays grounding us for some time.
There were some initial design features that in retrospect were probably the best, but this model seems to be simpler to operate.