He's not exactly offering training information, just showing repairs in progress, sometimes using a microscope for filming and chatting through what he's doing. He says as much about Apple design, strengths and weaknesses as anything. He also demonstrates how many of the repairs are relatively easy for a skilled technician, and bemoans the fact that Apple will not attempt the repairs while at the same time working to put him out of business. They've even taken legal action against him to stop him obtaining parts.
Anyhoo, the point is that just as they have strategies that stop, or at least greatly inconvenience you, when you are recommissioning your Power PCs, so they also have strategies to stop you repairing your own property.