The recording date is 2019/05/19.
This is not "official" sign world, but it's more fan-made world by someone. The wall is filled with basic words to learn in ASL. One of them is teaching me in sign language.
This sign world is much less known, it's not often visited.
The world is already taken over later by other better sign world. See next video.
Notice at begin video Loskov has here "VR headset", a cheap alternative wired version, makes bit possible to move hands around.