"Double-blind tests are the gold standard in every field of science'
However, only if you isolate very single factor except that, which people don't do, therefore makes most ABX testing audio wise invalid.
ABX testing is great only if you isolate those factors. e.g. the headphones must be at the same position on your head every single time, you must in the same position away from the loudspeaker in distance every single time etc.....
This is why scientifically valid ABX testing in audio much harder than in other sciences, which the vid doesn't address directly. Otherwise, the vid's fantastic.
I firmly believe in the theory of ABX however the way it's conducted by most people makes it scientifically invalid.
Anyway, 13-14 bit audio is where it starts to get :S for me. 16-24 bits = zero difference.