You probably worked it out already but you are looking at the different timings of knockdowns at the start of the video, and I add here what I used to do when I was climbing to master with zangeif. The situation for me would come up after a DR cancel in to cr mp, cr d/f mp xx lariat. If i hold down forward I would get the earlier hitting lariat and if I let go of directions I would get the later hit. One use of this is to get more frame advantage on lariat knockdown which I would use to walk forward more and earn more drive meter after a drive rush combo. mid screen. Another way I would use the different frames is to mix up timings on pressure to make it harder for the opponent to guess in the corner, on their wake up.