Both NOC John Hudson engine and gearbox rebuild videos do also make me cringe a little here and there, as his tools and methods would be considered rather basic by modern standards at least!
But he was the factory service manager for many years, and would regularly travel to a Norton owner's house to fix a major fault on their machine carrying no more than a bag of tools strapped to the pillion seat of his motorcycle. The repair being done wherever he was able to do it, even on the kitchen table if necessary. So for anyone to say that he didn't know what he was doing would be seriously wide of the mark, and in the videos he does heat casings with a torch, but if done correctly then there's nothing wrong with that! He certainly does remove the bearings by tapping the casings on blocks of wood although he does gently tease the odd bearing out with a punch if it appears to be a little tight to hurry things along a bit (after all the cameras are rolling!) and I'm sure he would have been able to strip an engine in the time most of us would spend thinking about it and be able to quote the part number, thread type and dimension of each part he handled as he did so.
John was also President of The Norton Owners Club for many years, unfortunately some while after making the videos he started to suffer badly from Alzheimer's disease, he eventually died in January 2003.