Youtube video here: https://youtu.be/E6qRbk5Cscw?t=1127
Most of the glitched worlds are clearly ROM fragments of world data being loaded, most of them out-of-alignment and being rather messed-up.
This one is somehow different. It's mostly but not 100% consistent; suggesting that its possibly loading some stuff from RAM instead of ROM. The characteristic of all the repeating clouds seems unique to it; and normal ROM data wouldn't look like that.
So what's actually going on here? What nonsense did it load? Is it in the middle of sprite data or something like that?