Broken Front Window???

That's not what car windshields are made of, they are made of two laminated layers of regular annealed (non tempered) glass, so when they break you get long cracks like in window glass, but since there are two glass layers with an adhesive layer they hold together safely. 

So that demo is bogus if they're using tempered glass, because the guy is striking it with a rubber mallet not with a sharp object like a rock. How many times do you see a rubber mallet flying at you on the highway?

In any event, you should contact FR for a replacement window. Maybe your trailer insurance policy will cover it. 

Maybe they use different suppliers, or because of a shortage of these, and installed actual glass in some of the recent units.

So not tempered glass and not laminated windshield glass. So that window has nothing in common with automotive glazing which is either one or the other. 

>

Tempered glass has >10.000 psi surface compression, you have to either exceed that figure or scratch through the surface layer before it will break. It is incredibly strong, but when you compromise the compression layer all that energy gets released instantly and the glass sheet turns into a bunch of tiny pieces. If you go to the tempering furnace in a glass factory that's how the manufacturing engineers know how much surface compression they are putting in the glass. They take a piece of hacksaw blade and scratch an edge, then measure the size of the pieces. 

Solar module superstrates are 1/8 inch tempered glass. I designed and tested them for a living. In our front loading tests they had to support 113 lbs/ft2 combined wind and snow load. That is over 2400 lbs on a 1 x 2 meter standard solar module.  To put that in perspective its about 2 feet of water over the whole glass sheet. They flex well over a foot in that test and still wouldn't break unless they popped out of the frame first. 

We had a marketing manager who used to go to trade shows and jump up and down on the modules to demonstrate how strong they were. He was about 6'4" and weighed over 300 lbs, a lot more than the guy in the FR video. We finally got him to quit doing that after one of our customers installed a big solar array on a tar and gravel roof. His installation crew was walking all over the modules and broke dozens of them, not because of their weight but because they picked up sharp gravel on their work boots and scratched through the compression layer.