Often it is more impactful to address one major/tangible player in a particular space than it would be to "boil the ocean" and ensure that we are capturing every possible player/transgressor. I agree that some of the video was overly breathless, but if that's what wakes people up to the dangers of unsecured cameras/devices then so be it.
This response would make sense if I was saying "why focus on Flock, there are so many other ALPR cameras out there" (also true, but not relevant to my point).
But this is a video that is mostly about things that are true of all IP cameras, of the kind that we've had staring out onto public streets for decades, plural decades. People celebrated those cameras, thought they were super neat, built sites indexing them. All of them do most of the same things this video says those Flock cameras did, the tiny minority of Flock cameras you can access publicly.