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/8UHPeylrCU8I 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."