[glaberficken]

Is that snow in the background? Probably a temperature thing? (lack of enough testing in low temperatures?) Can be that the glass is fine but that the frame surrounding the glass is contracting too much or twisting in the "wrong" direction when cooled. Causing the glass to shatter.

[giuliomagnifico]

Also my thoughts are about temps differences between inside and outside, or the window was getting very cold for the first time, the tolerances were too tight and krack... it's a supposition.

[jdxcode]

Considering the other video has the reflection of a palm tree I'd guess it's not a significant contributor.