Paul-
This is a common problem. Even in the videos, I may have knocked it apart before shooting that part of the video. In some of them, I do show how to knock them apart but not in all. I try to keep the videos as short as possible.
Anyway, here is what you do.
1) Flip the tub so the shaft is sticking straight up.
2) Support the plastic tub on the floor so that the metal basket has some space to drop down (make sure to support the tub all the way around or as much as possible as it will create less bounce and help prevent breaking the tub)
3) Get a big hammer or sledge and a block of wood
4) Hold the wood over the shaft where it sticks out of the tub and pound as needed to break it loose. If necessary, have someone else hold a longer piece of wood so you can really give it a whack.
Jerrod