Well, that's really my point here. You have no way of gauging the skill differential between the players in these montage videos. You don't know what builds their opponents were running. I mean...you don't even know what builds the author is playing hehe. I can really only say that, based on their level, the author has definitely spent hundreds if not thousands of hours playing WvW.
So again, look at how edited this footage is. They're removing all the parts they don't want you to see. A video heavily edited to further some pre-constructed narrative just doesn't resonate with me, especially when Vallun's video makes many salient points.