lore video deleted

hi all, yesterday i saw a video on youtube, title with smt vaguely resembling “this horror game is actually real”, and i thought i saw the channel name had “cosmic” or “cosmos” in it. the beginning of the video talked about how people come back and check on the games development here and there and leaves comment under the trailer. the end of the video loops back to this (i didn’t watch the whole video)

but ive never even heard of the game so i found markiplier’s playthrough and just finished it.

then when i try to find the above mentioned video, its gone, it says the channel doesn’t exist, then when i refresh the page the video completely vanished in my history on both tv and mobile.

i hope i am not crazy.