Well most of the maps are build ingame and then exported, animated and rendered - so there is some sort of in-game relation, but I see your point.
As for the 200 subscribers - thats only about half a percent of the subscriber count on Youtube
But my main point is still about the category names - 3D Art will always be animated, therefore not in-game and - according to your logik - not a project. So then why does this category even exist? ^^