Here are screenshots of the video:
It is near a railway with at least 4 rails with it and a big building.
This is the location:
Blue is the view when the rockets are fired.
Dotted blue is the view in the last screenshot above.
This is a screenshot of the rockets being fired:
On a grand scale the map looks like this:
Blue = cameraman
Red circle = known target being hit
red line = trajectory of rockets
For more details about this attack look here.
A photo taken from the website of the 18th Separate Motorized Rifle Brigade shows how these GRADs fire:
@TukvaSociopat had been able to determine the location of the abandoned GRAD:
В военторге купили... pic.twitter.com/JlWVeArILW
— Reincarnation. (@TukvaSociopat) June 16, 2014
Also see: Evidence that a Russian unit was involved in firing the GRADs
Also see: Russians caught firing a GRAD