I'm sorry to hear that he's using your blog to create his own content and not give any credit at the very least. (I'm a big stan of your blog btw).
I also hear the other members posts about not giving him time/air and for quite sometime I have been ignoring his videos. But his latest one is just a downright lie. I don't post any comments on his YouTube account. I find his behaviour problematic and irresponsible. I know this is about toys (nothing serious) but I don't understand his need to be so bitter and twisted.