That video was ok... Don't ever bake them.. The fumes include Cyanide which is lethal!
I always used the boiling method but it kills saucepans and does really smell of burning rubber, in the video the water wasn't exactly boiling, used to only take 5 minutes.
Acetoning is best... Although it is better to put the acetone in a little jar and not soak wheels in it as it does damage plastics with contact, just use an airtight container... Wouldn't get it on your skin either, will do damage at some point.