I analyzed the video. made some screen shots and looked at the wiring.
could not find decent info on the transformer (but a good screenshot), but since nelson his other ciruit that he has posted online, I guess this is used as a stepup transformer again.
The middle white wire is connected to the negative of the DC powersupply. So I guess the white is the neutral.
The rest of the transformer is wired up weird. I guess it is a 230V in 2x 12V out. not sure.
the black thing seems to be a capacitor (what else?)
The capacitor is on one end connected to the neutral/negative powersupply.
The other side of the black capacitor is wired to red AND blue
the battery rectifier is hookup up to black and brown.
So... If the mosfet gives power pulses (probably high frequency at the resonant frequency of the transformer/cap circuit)
The pulses go into both 12V positives (working together) DC pulses.
The battery is charged of the double 12v negatives?
the 230V output is recitfied and via capacitor into DC motor.
What about the interaction of the exciter (toroid) and the power pulses (mosfets)?
BEMF feedback module test