Shotokan has its roots in Okinawan style since the 1920's. Most of their katas are adaptations of the Okinawan's, with new Japanese names.
Your video does show sweeps and accompanying hand motion, you just do not recognize it. This is why there are Sensei's. Also, Shotokan katas are more stylized than the Okinawan's, so the meaning of some moves may be harder for the untrained observer to discern. There is a lot more going on in kata than blocks, kicks, turns and punches. Why not take lessons, Acronym. It seems you have a keen interest in it.
But the JKA rules states that grabbing is not allowed, and he grabbed even with two hands and swept. Are there multiple JKA organisations?