I enjoyed watching some of his vids for a while... even when they made me scratch my head a bit. *shrugs
Definitely lost it with talk about cables making a difference and such.
For me, and Amps, I want to see a good quality, stable power supply. Throw in a good capacitor bank. Oh, and a clean signal path with no coloration.

I do think that driven within parameters, Amps should not change the signal passing through them beyond simply Amplifying them. And that should be able to be done without any telltale sign beyond Gain.
I might get to experiment soon with some nice Class Ds. We'll see.
