II didn't listen to the video, partly because I didn't have the time but mainly because it's a subject that has been part of my hobby for six decades and have seriously thought about it ever since. Plus I have had friends who were designers and who were among subjectivists. For one thing I even wrote for Stereophile when Gordon Holt who is the person most responsible for 'subjective' reviewing. And the answer is both and not either or.
Both subjectivity and objectivity should be used to their maximum. But while the final answer is sort of subjective, the more the objective the better just because objective is precise and agreed upon by most. While subjectivity has a lot more wiggle room. And making final subjective decisions it depends a ton on who makes the decisions. They vary from person to person. Although I do believe when a number of experienced subjective reviewers basically believe that comes almost close to objective subjectivity or is it subjective objectivity.
And finally there is the ultimate subjectivity but it only applies to yourself. I always advise those looking for audio advice that the most important factor is know thyself. You need to know those attributes that offend you because no matter what a device does that you like or even love if it offends you at all it will never satisfy. And it's good to know the attributes you want in a device, the more the merrier but I do think if it has many of them a few missing are less a problem than even one negative characteristic.