Sorry I didn't know you were looking for the Arduino in the videos. Hope this helps
This is a different fan with the motor controller integrated into the motor but they both work with the same signal. Wire colors change on the fans from model to model. On this fan the PWM wire is Blue and Green and the Ignition on wire is Black and white.
Of course this time when I took the video everything worked perfectly and the voltage at the PWM wire read ~ 0.8 volts. I couldn't even get it to fail for about 5 on off cycles after the video was complete. Then it suddenly started doing its old tricks. Would not reset when turning it off and it was back to ~2.5V at the PWM signal. I think this video link should work. I have it shared as private so anyone with the video link should be able to see it according to youtube. Please let me know otherwise.