Very good video and very good work. For others who have not watched it, he shows that a cheap USB cable going through a Toslink loopback on RME creates bit-exact output. He shows the same with S/PDIF and I^C. He also goes thorough explaining that if there were bit errors, they would be random and not create the differences audiophiles talk about.
On your question, yes, I have reviewed a number of analog cables and none show any improvements and a few actually are more susceptible to noise than cheap cables. Key thing to remember is that as the
simplest part of your electronics, your cable has far higher bandwidth, far lower noise and much less distortion than your complex audio gear. For this reason, it cannot possibly make a real difference. Measurements and null tests with music show the same. In this review, I show how the cheapest, oldest, crappiest RCA cable is still transparent to the source:
https://www.audiosciencereview.com/...ton-rca-cable-review-ultra-cheap-cable.33473/
Above shows that the cable has the same performance as having no cable!
Here is a review of Nordost speaker cable compared to generic:
https://www.audiosciencereview.com/...ost-superflatline-speaker-cable-review.45615/
It actually picks up more noise than the generic cable. But otherwise has flat bandwidth to 200 kHz and beyond, just like the cheap cable:
There are many more tests like this.
That said, if work hard, you can find cables that make a difference like too thin of a speaker cable, or one with poor quality. Spend a few dollars more and you are assured transparency.