Hardly a controlled, scientific test... is it.
To make this a controlled, fair and repeatable test - for EVERY phone, you need:
~ 1/ To ensure you have a "control" surface - for example, a 2x2ft square of concrete, that is the same exact area for every device, every year.
~ 2/ Make sure you are dropping them from the same position onto the same area, year in, year out, to make the test repeatable and consistent.
Uneven, rough stone blocks, as seen in the video, have naturally occuring protrusions; the protrusion is going hit the screen FIRST, concentrating the fall of the device into one - or a few - specific, concentrated area(s).
No scientific, accurate SERIOUS test is going to be taken seriously unless you start EACH TEST with THE SAME environment. Having some random hipster just walk out into a yard and drop a phone whilst filming it, IS NOT scientific. If he chooses to use a flat concrete area one year, then a rough stone floor the next, the tests are as good as useless.