I'll dive into the world of surreal horror for mine:
Bit of a disclaimer: Neither of these are going to make the foggiest bit of sense at first. You have to stick with them for awhile. And even then, it's a bit of a puzzle to figure out what's really going on.
I've watched through both of these countless times. They're easily my favorite series on Youtube and these videos smash every episode into one place.
Bit of a warning: That second one is *really* twisted. Yes, it's animated, but I want to make this very clear: If you're squeamish or easily disturbed... dont watch that one. This series is infamous for a reason. It starts out fairly tame but it's not too long before things go downhill into madness. You've been warned.
And then there's... that. There isnt any gore or anything in this one. This one revolves around just being really... disconcerting. Anxiety-inducing, once "that" starts happening.
It's not a series... it's just an 11 minute video... sort of. Those first two, you can make sense of them if you really think about them, pay attention for small details, and maybe re-watch. But this third one... Try as you might, you cant make sense of this one. Not without diving really far into the "puzzle" elements, and the key that opens that is, itself, hidden in the video. And then you're really in the rabbit hole at that point, once you spot that and follow it. And even then, after all of what's in there... yeah, good luck.
But you dont really need to understand what's truly happening. Taken at face value this still is just... well, it's something, alright. It gets more disturbing if you catch some of the blink-and-you'll-miss-it bits in there.