Just wait it to happen, hold your breath until you see them. What is funny about this matter, whole video is about this bloke, to which Samir is teaching how to change appearance of his lower lats by chancing his training technique. So your point is that you know this better than Samir, and every mr olympia/mr universum before Phil Heath? Well, I am happy for you, you must be a walking, farting encyclopedia of the art bodybuilding, compared to these pitiful fools..
he changes the appearnce by making them larger, the muscles have tie ins that dictate the shape, you cant alter that.
As for Olympians knowing everything, I spoke to a former pro who was having breakfast with Ronnie, he asked him about his diet and he said "I just do what Chad tells me"