Dash cam powered by rain sensor
 

I have come across this:
https://m.aliexpress.com/item/100500...c135ec8d3d12fc

It is a dash cam that draws power from the rain sensor supply; does anybody have any experience with anything like this?
I am always wary of interfering with the electronics on any car as they can be sensitive at the best of times, and damage can cause all sorts of unexpected problems, as well as being very expensive to repair.
It does look to be a tidy solution though!
Any thoughts?