- That cat couldn't have weighed more than 6 kilos. I've got a couple of 12 pounders myself and although they are indoors-only, I don't think that they could damage automotive glass
- I've had some neighborhood outdoor cats jump up on my car but the only evidence is their sometime muddy paw prints up the hood and over the windscreen. Have never had any glass damage; paint maybe but I'm not anal enough to fret over every single scratch my car gets.
- Photo you provided of the windscreen showing the damage is horizontal. The cat's movements were vertical. Furthermore, the photo appears to show the right A-pillar, the passenger side of a RHD vehicle, with a chip or dent at the very edge of the glass. The cat in the video did not approach the edge on that side.
- If you are asserting that the damage on the edge propagated a crack horizontally, then I'd say that it's more likely that something hit there and skidded or was dragged across the glass.
From the photo, the glass seems to be scuffed rather than cracked. At least that's my impression. Having had a couple of windscreens replaced on my vehicles over the years, all of the damage have been very sharp,
thin lines. Or a divot when a rock hit it. I don't have any experience with the multi-layered glass that's now used with these new vehicles. Have you had the glass inspected by a repair company?