I think Wikipedia's relatively conservative (one might say erring on the side of safety) stance on free use is easy to understand when considering that they have a bank account stuffed to the brim with cash, minimal spend on hosting and developers compared to income and savings, and copyright lawsuits are one of very few of their exposed legal surfaces.

Additionally, folks don't like to rely on free use because the tests, though they have been well articulated, are inherently subjective and must be decided by a judge or jury. It's the sort of defense one wants to have available, but not depend on if possible, as a result.

Re: commercial use, in the US, just because a work is commercial does not automatically mean it loses fair use protection. Commerciality is only one factor of the four to be considered. Commercial parodies, for example, can still be fair use, especially where the work is transformative. IOW commerciality may weigh against fair use, but it is not dispositive. Google v Oracle involved fair use which was clearly commercial, for example.

GN's case would also be helped by the nature of the information being factual as opposed to artistic.

There are a lot of factors in whether or not an org can successfully take something to trial. Venue, judge, representation, jury selection, evidentiary rulings, all kinds of stuff. An imbalance in representation could easily swing it. So when I say that I think GN has a reasonable case, it's just me using the Supreme Court's rubric and some theoretical idealized court room which doesn't really exist. All I can say is that a good job could be done in arguing it. Whether or not GN could afford that work, or would want to, IDK.

I think people misunderstand the 4 tests. They are not in-or-out tests. Commercial use doesn't mean it's not fair use. Each factor is weighed against others.

In this case this case the purpose is for critique or review and it justifies fair use since the clip is only a small part of the video, GN isn't in the same business as BB and isn't substitutive for BB's work, and the clip was a recording of a factual event and had didn't have a substantial creative element.