This sounds as useful as the speaker demos people post on YouTube!
Which are indeed useful. My Moabs were purchased without audition, and part of my search process involved listening to them on the same YouTube videos you disparage. They sound just as expected from those videos.
Before that I bought a Herron VTPH2A and Koetsu Black Goldline, both also "auditioned" watching useful YouTube videos. Lo and behold, they sound as expected.
A lot more went into selecting those components than just listening to them off my laptop. A lot more. But those YouTube videos are indeed very very useful.
At least, they are useful once you learn to listen.