To be honest I never heard of him before you came along and mentioned him.
He doesn't seem to explain much in his tutorials.
Personally my favorite tutorials come from a guy who calls himself Dr. K. His real name is Brendan Kavanaugh and this guy does some amazing tutorials on Boogie Woogie style piano.
https://www.youtube.com/channel/UClw8Huc_XZcz46GJh5Z0wuA
The thing is, you can adapt these scales and playing styles to any other genre of music and he's produced literally hundreds of 3 to 5 minute tutorials on the subject.
Do yourself a favor and look him up.
Gary