No, it isn’t informative if you’ve ever read the manual to your dishwasher. Dude bought a car then a house and goes around explaining things about them that are clearly explained in owners manuals. He does some interesting videos like the pinball machine or jukebox tear down, but the rest mostly non-substantial filler. Dude needs to stick to electromechanical tear downs.
They are absolutely not “completely disassembled every year.” Where do you people come up with this stuff?