I've seen a video by this guy. He seems genuine. My problem with reaction videos is that it's very clear why there are so many. Even the most genuine and honest people are still doing it for the obvious reason of making that sweet YouTube money. Channels like Blind Wave is a group of guys watching stuff, and it feels like you're there with them having a good time. Angry Joe reacting to movie trailers doesn't bother me either, nor does Lost in Vegas, although I stopped watching them. To stay on topic, when it comes to the gaggle of "vocal coach/*insert profession here* reacts" videos, I prefer Elizabeth Zharoff. She's legit and it doesn't hurt that she's easy on the eyes, but most of them are. She doesn't have her cleavage out to increase her views (not that I'm complaining, but come on now, it's more transparent than a ghost), she's very respectable, and like I said, a legit opera singer. She has also interviewed some musicians including just recently Devin Townsend. I haven't given him much of a chance, but he's a really cool dude.
The Charismatic Voice is her channel.
It's sad that this guy is one of the better ones, but he isn't a woman so he has only a fraction of the views.