Looking at the debris of the explosion, the direction of the shot should be from the left side of the footage.
not necessarily, the object being shot isn't exactly a single solid structure but rather a vehicle made up of lots of hinges and individual parts like doors and such. Depending on the type of ammunition and the exact location of the shot, I think having the source of the fire come from the right side of the footage makes sense, considering the debris which is flying off seems to the door.
Also, I think there's a CCTV clip which this is a part of, which shows it is part of a PTL02 anti tank gun exercise.