DYK is a YouTube channel stating (or at least it thinks it's trying to) facts, and it's anime sector is giving AzuDai a turn! It features that fuckhead "Gaijin Goomba" but don't pay attention to him and have a look if you like:https://youtu.be/8UHPeylrCU8
I could be wrong, but weren't these "facts" just notes stated on the inserts of the ADV's DVD of the series? He also mentions "rumors" about Yotsuba not being animated for a series because of friction between Azuma and some other dude, but I never heard of that before. Apparently, Azuma debunked these rumors himself, but who knows with this asshole and where he's pulling his "facts."