At first, no owner opened the door,
The chance of not getting a car is 66%
Whether you choose the winning car or not.
The host will open the door with a goat.
So I think it has no effect on the probability of the first choice.
The chance of getting a car by changing doors is equal to the chance of not getting a car the first time.
It should mean something like this.
But I think it's too far-fetched
Personally, I think the odds will be 50-50.