On the one hand, that makes me curious why introducing UV made the Vibrant less effective. Granted that could, of course, be attributed to a million other things. On the other hand, it shows how a "peer review" can be wrong, right out of the gate, when working with a flawed premise.
But something else you have to keep in mind, as much as I love the BRS videos and I honestly do get quite a lot out of them, don't kid yourself, these aren't entirely unbiased. You have to remember, they're commercials for BRS and for the products they're demonstrating. You wouldn't expect Thomas do a box-opening/review on a skimmer and spend 7 minutes trashing everything from the design to the noise to what a nightmare it is to clean. Similarly, lets say while researching a video on Vibrant, they came to the conclusion that it was re-braded algaecide, that's not going to be the focus of the video, if they do the video at all. I'm willing to bet they've planed videos on a products only to find out they don't have much good to say about it and move on to the next thing.
I could be wrong, but I don't recall seeing any of their videos where they came right out and said 'don't buy this, the manufactur made multiple false claims'. Sure, you'll usually get one of them giving a mediocre review of something, but it's usually couched in praise by the other so they can say 'give it a shot, it might work for you'.