At the local mine the D8 operator was cleaning up the area and gettting near the softer edge at times. https://www.youtube.com/watch?v=J_XVdE-lI94&list=UUBDziNm8KrCQ4j3sv7ozXeA
Didn't look like there was anything for the operator to get excited about. He always kept a good sized spoil pile on his left and knew how far to push.
I would agree with Welder Dave. The video is being shot with a telephoto lens which compresses the distances making things look closer than they really are. The only part of the dozer actually close to the edge is the blade and left front idler at the end of the push. Even at that the operator isn't clearing the material completely from the face of the blade. It would have been nice to see the entire push the dozer was making and a different angle would have told a better story.