Let's review a few things from the last clip.
They as we see are falling at a slanted angle which gives the impression that glen does not get the opportunity of being sheltered .
The landing scene
When it shows glen laying down he has nothing above him except a hoard of walkers, there for eliminating the possibility of anyone or thing sheltering him, suggesting that it was a camera crotch shot.
So basically no matter how much we want Glen to survive the chance is 50/50.