It’s a great video, agreed. Goes to show that boxing is technique and experience more than most things.
Some people would argue that old mans punches were a bit wild and could have better technique. Every one of them landed so I’d be less concerned about that and more concerned about keeping your chin tucked and covered .
Old man also controlled the ring, if you’re in the centre, then more often than not you’re the one dictating what’s happening.
This is much more apparent at the novice level.
Chin should always be covered by the rear hand, no ifs, ends or buts.