Yes, it looked kind of like a Twitch stream, with a persons camera in the bottom left, and the game itself looked like a game like The Quarry maybe? Let me see if I can find it.
It’s gonna be some form of horror game. I’ve heard speculation that Kojima regained the rights to P.T. (The door you see in her eyes at the end of the trailer looks like the same door as in P.T.) so it may be somehow related to that