Good channel I found it through my interest in making cider. He made an apple scratter which works fairly well ( https://youtu.be/htT-gZ7ck64?t=147 ) but having done more research I think Claude Jolicoeur's (renowned cider maker) is better ( https://www.youtube.com/watch?v=JuEqqSgoGcQ ). You can see how superior the latter is in the videos which because of its "wedge angle" has no need for a hand plunger to force the apples between rotor and the stator