Opinions on this, please.
It is a great starting point. It contains some elements of thumb over technique. I would like to add that consider modifying it to a group of 123 followed by a second group of 1234 and not 12345. Do what his video says for both groups, the "forearm rotation", "yaw" and "leading with your elbow". This way you can play scales for more than one octave.Finally, try and figure out for yourself how to do what he says in reverse for the descending scale since I watched the whole video and it wasn't covered. That's my opinion, Joe.