I love little things like this. Explaining why a grass tile in Super Mario World was modified to look worse in the PAL release.
I'm hard at work trying to get the next video for the channel done soon, so I'm cheating this week. If you followed me (IsoFrieze) on Twitter about 3 years ago, I already talked about this there. But it's the exact sort of thing I love talking about so I don't mind sharing it again!