I would suggest to get Five 50 ohm 25w resistors and connect them all in parallel to make a 10 ohm 125w resistor and test it. You maybe surprised of the results compared to a high resistance bulb.
That does sound like a better test. I'll have to setup for it and see what numbers I get.
Ultimately though, we need a load equal to or larger than what the motor draws and when this load is connected, there should be no RPM change or additional stress on the drive motor. In fact, it would be good if the drive motor actually sees less load from the generator. I saw this in your video. You were using 185 watts with the switch off and when you switched on, the watt meter went down to 179. Whatever was happening there is the magic we are looking for. That slight decrease in motor load is what will give us the gain needed to loop this device.
So let me ask you about using a DC drive motor. Do you think the lower the voltage the better? I would guess the internal resistance for a low voltage motor would be far lower than the internal resistance of a high voltage motor. My question is: Is there a sweet spot here. Too low may try to draw more amperage than we can provide while too high adds too much resistance for the circuit to be effective. So of the sizes of DC motors (12, 24 or 90 volt), which one do you think has the best chance of working here?
Now add this to my previous question. Do you think having a large filter cap across the motor will help any? From my simulations it would appear to. What's your take on it?