There seem to be few 'Black Man reacts to Rock Videos' popping up. Genuinely open minded guys that have zero exposure to rock and checking it out. Often from Youtube suggestion algorithm, which is giving them hits and more accessible tracks.
I find some of the responses interesting. In Justin Walkers videos, he seems genuinely surprised by the quality of singers, their range and technique. Blinkered a little by some of the screaming and growling and throaty sounds of heavier music that gets airplay, he's realizing there is more to it. First saw a video watching Heart and surprised by the harmonies, and clarity of high notes, then Queen. Although he didn't like Black Holed Sun, but did like Pearl Jam, he's figuring it out when those two collide in Temple of the Dog. Surprised that musicians just wanting to play with other musicians is more aceeptable. He's getting into Grunge, really struck by the sentiment playing and feeling of the singers.