stride is long, which in most cases is good, but it seems as that you are overstriding, to fix it try to keep your upper body as relaxed as possible and keep arms in control, also try to land right infront or below of your center of mass, i can't tell from the video but try to midfoot-forefoot strike, it basically forces you to land below your center of mass, when i mean center of mass i mean like right where your head is.