Playboy, obviously, does not own Mario. It did not create Mario Maker. It did not build the level on display in my video. And yet my video was still flagged. What gives?

Source: Super Mario Maker Exposes More YouTube Copyright Stupidity

This, he reasoned, must be the source of the copyright claim. Because automatic Mario Maker levels play out the exact same way for everyone that experiences them, that segment of footage was identical for both of us—down to the very last frame. YouTube’s automated system seems to have flagged it for that reason, even though my footage was uploaded first. Pretty silly!