Playing missions on VR isn't relevant to the point of the video. It's a flat terrain that doesn't produce any unwanted variables.
The first video I posted on the VR map, the hull was damaged even though it wasn't covering the turret. The 2nd video is similar to your 2nd video, that's why I chose that location and angle of the shots. Both videos show me as the gunner being killed after only 1 shot to the turret.