Where’s the fogged windows, then?
To be clear, you don’t get water drops without fogged windows. You don’t go straight to “waterfall” from breathing. If you don’t heat, your breath condenses on the cold windows, accumulates slowly and then through surface tension forms drops, with clear visible lines running through said “fog”.
On top of that, it wouldn’t just accumulate on the roof – it would accumulate on the side windows and windshield first, because that’s what you’re (usually) breathing at, with the windshield also being the coldest window in the car (convection cooling).
It also takes a while to accumulate as much water as he’s showing in that picture. We breath out 15-20ml (ish) of moisture per hour, even if all seats are taken in the car that’s too much water given that the car basically runs out of power within an hour.
I still might be wrong of course, but at first glance it does look much more like a leak than it does like condensation. Maybe i’m just seeing things and the water ingress isn’t as bad as i can make out on the picture, but that looks severe with at least 6 or 7 drops already hanging there.
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.