I guess I can't tell because the cursor has to track the movement of your finger on a trackpad or the movement of a mouse. The video doesn't show what's being commanded of the cursor. I don't know how you would show that. But it's ok after a reboot? Does simply logging out and back in fix it too? Is the CPU busy doing something else? My cursor will become jerky if the machine is running an intense task that saturates I/O.