Your Hi End Audio Cables.

"@hilde45 Finally, system context matters. Some cable differences are audible with certain amp-preamp combinations and inaudible with others. The video assumes all cables behave the same in all systems. They don’t."

I've been testing and comparing this topic lately myself using the same tube preamp connected to two different amplifiers in rotation back and forth. 

The SS Class A stereo amp is 75k ohms input impedance. The tube mono block amps are 100k ohms input impedance. Totally different types/amps of course.   

I can change to other RCA cables on the SS amp to make it sound more like the tube amps but both amps do not sound similar with the same RCA cables fwiw.

Interesting Responses,

If you listen at the end of his video, he asked for comments from the viewers on this topic. It might be time for some feedback to him from Experts here with High End Equipment and cables and maybe share your knowledge so others who read the comments might learn from you.

Just saying. As for myself I have no experience with high end cables. I do have I end SS gear. 

Just My $.02 Worth.

Well, it is hard not to assume this  wasn't for fun. As you point out, he did go to school. 

I do have decades of experience with high end cables. So, I laughed heartily at the video. 

Well, it is hard not to assume this  wasn't for fun. As you point out, he did go to school. 

I guess my bar for "fun" is a bit higher than hackneyed trolling about cables.

@mrkrichman 

I only watched a few seconds of the vid since I’ve seen this guy before and he may eschew the ridiculous beliefs that too many people in the hobby have he’s still got an axe to grind.

I’d rather read the countless threads here where an OP states his views on a topic and then goes on and on with endless rationalizations when subscribers call him out on his completely baseless reasoning. It’s like this recording engineer doesn’t have enough to do either!