Im not in home so can't watch vids. Can you give a short description? What's the game about, how is it's gameplay?
Edit: how does it compare to the STALKERs, just to cite another game with an alive ecosystem?
It's a survival/platformer/stealth/action game where you need to traverse vast hand crafted maps. There are no skill points, no weapons to upgrade etc., your upgrading comes from you as a player familiarizing yourself with the environments, different things you can collect and sometimes consume and creatures and figuring out how to survive.
The AI is pretty elaborate and every type of creature has their own unique behaviour and hierarchy.
You are not the only target in the world with everyone out to get you. Creatures attack each other as well, but not in a suicidal way. Weak species will not attack stronger ones, but rather run away and hide.
There are also neutral creatures that mind their own business and will not attack until provoked.
The world exists without you, but restarts every time you die, i.e. creatures respawn from their shelters and go out hunting.
The world consists of a dozen huge( and i mean really, really big) non linear areas, which usually introduce some new gameplay mechanic and creatures.
In order to transition from one area to another you need to open so called karma gates with a special sign. Every time you successfully hibernate(sleep in a special shelter, which are located all over the world) you gain a karma sign. There are several signs and you need to hibernate as many times as needed to get the specific sign you need for the gates you want to open.
So the gameplay consists of this: you wake up from hibernation, go out and scavenge for food(fruits or bats) surviving different creatures along the way. To successfully hibernate again you need to fill your belly with food(several hollow dots on your UI that fill up when you eat).
You need to find a new shelter or go back to the one you just left in time before rain starts coming down obliterating everything and everyone. So there's kind of a timer. Usually they give you enough time to scavenge but still feel tension. When you die you respawn in a shelter and lose a karma sign.
It's a very difficult, sometimes unfair game(just by the nature of it's unpredictable,life like AI). But it's so fucking exhilarating and tense, with your heart literally pounding everytime you survive by the skin of your teeth, it's worth it. It's like fighting a Dark Souls boss barely surviving kind of stress, every time you go out of the shelter.
Kinda difficult to compare to Stalker, but when it comes to emergent gameplay and systems interacting with each other Rain World is ,imho, leading the way.