Electrical Engineers understand electricity best. Pretty simple. I tend to believe what I learn from them and how it may or may not affect sound quality. Especially ones with no agendas, hidden or otherwise. Guys like @kijanki for example.
Also a video about how electricity works is fine but how a particular product works or not is a different thing. Its not a purely subjective thing. Research is NOT subjective. There is either data to support a conclusion or not. Otherwise its a leap of faith. Synergistic Leap of Faith....does not have a good ring to it eh? Does it sound good or better? 100% totally subjective. Not that there is anything wrong with that.... Except when it is the mantra of a company with "Research" in its name, perhaps.
Just saying. PEople buy lots of things just because. That’s their choice. High end audio ain’t no sanctuary holier than the rest. Same thing. PEople sell and people buy for whatever reasons they choose. YMMV.