Ludwig held a chess boxing event with a bunch of streamers and YouTubers a few years ago. It was a good watch but he lost a lot of money and said he wouldn't do it again.
The odds you picked the correct door at the start is 1/1000, that means there's a 999/1000 chance it's in one of the other 999 doors. If the man opens 998 doors and leaves one left then that door has 999/1000 chance of having the prize.
It's OC 😉