It's more that your video arouse my curiosity. I knew that i read something about that last year. but i didn't take it serious until you post your video
When i found that, i shared it to you since you were wondering how he was doing that.
I see. Well, I may not be wondering about it the way you might think. It's almost sure that his technique is tool based, so the question is rather which tool.
Since the technique in your videos only works with fight sticks, it's rather obvious that this is not what he does because I know he's playing with a (XBO) controller.
Or he just became used to play with a stick pretty fast.