Got the same issue with my car. Audi A6 2019. Poor video on my part. But basically having a nightmare with Audi UK who have refused to cover the cost of diagnostics which is £140.00 per hour. The diagnostic work will take hours for Audi to find the problem. Not sure how on earth the water is getting into the car.
Audi UK don’t care about the class action lawsuit either. Link below.
https://www.gcmsettlement.com/#:~:text=In the action%2C Plaintiffs%2C individually,result in water or liquid
Any and all advice welcome.