Here's some information not documented anywhere...

The Left position when activated has to be between 25 and 125. the Right has to be between 130 and 230 AND there must be at least 50 points between the two numbers.

In my machine I get 102 for the left and 172 for the right.... This is acceptable since both fall in range AND there is 70 between the numbers.

The first thing to do is see if the hall effect can even pass. To do this disconnect the coils, start the test, and hold the motor to the right. When the number gets to 200 move the motor to center with your hands and hold it there until the number get to 100 then move to the left. Follow along with any other movements it tries to do playing with the 100 and 200 numbers. It should show the engine passes test.
This only works if it does sense left and right (your video shows it does) when it is left and right.

If it does pass, hook the solenoids back up and tell it to center the motor using the other motor test in diag, use the pot in the motor, under the front ramp, to actually center it. (assuming you have the pot, if not its a lot more complicated).

Once you have it centered, run the left/right test again. It will probably fail, but now you just bend the magnets on each side until they meet the first criteria above, and keep running the test, bending the magnets until it does. Its complicated, since you have to have the motor centered to get the hall sensors tested, but the hall sensors have to pass the test to center the motor.... By doing the hand movement above your faking the machine to pass the sensor test so you can center the motor, and once the motor is centered you can "adjust" the magnets in the hall effect sensor.