The first one was at my boxing gym years ago when I saw these two dudes sparring at full speed with like 100% power but each and every one of their hits were dodged by the other, and the second one was the replay of the top ranked player in Devil Daggers. I don't know what to say, honestly. I'm speechless to what I saw, my eyes hurt from visual overload, and I don't know.
I watched this ingame after having played the game a bunch. I think you appreciate the clip more if you get the authentic experience