I don't think Lanza would fall into the category of lolcow slop channels but I do agree that he should link the threads but knowing YouTube it would probably fuck his channel over given some niggers still think kiwifarms is a anti tranny doxxing site also I do agree that he should do his best to credit the creators of the threads that he clearly uses for his videos and from those who post information on said threads that go into his video's.
Also I cannot confirm this (I swear whenever I say this shit it turns out to be true), but YouTube isn't a fan of kiwifarms links to threads or anything else because you could get demonitized for having them in your video's description so people will just have to look it up on their own.
In my own opinion I don't think Lanza would fall into the category of "lolcow slop channels" as he doesn't really seem to moralfag at all in his videos and from what I've seen, he just gets straight into the point of everything at least and he clearly seems to actually put effort into his video's instead of being a orbiting moralfag nigger like kiwitapes or Smokey.