In my experience, CharlieMike is the most realistic reviewer second to SouthNarc. I realize SN isn't a contemporary reviewer at YouTube, but he used to be a solid voice of reason pre-video-internet via his articles at selfdefenseforums.com before it's demise. Seeing as how the man utilizes what he preaches everyday he's on the job working undercover as a Narcs Officer and in training, he's hard to ignore. Train his techniques and you'll quickly see what I'm getting at.
I may be missing someone, but everyone else I've viewed as "knife reviewers" on YouTube appear to constituents of the "Let's set a camera up in my bedroom and make a video, 'cause while I've never really experienced/simulated a critical situation with a knife, I reeeealy want people to think I'm awesome" school of thought.
I see a knife as both a tool and a potential weapon. In my opinion, if you ignore one or the other in your evaluation, your missing out on a huge portion of your audience. I gotta hand it to CharlieMike, he never misses out on the opportunity to evaluate both.
That's what I look for in a review.
Be prepared and stay safe,
Taylor