The pan-tilt heads typically have two axes that you can control. There's a center column that has a tensioner and allows horizontal movement for panning, and there's an axis at right angles to it which you use to tilt the camera up and down. Both the tension and the angle are controlled by a long handle (a "tiller" or "steering column", if you will) which you hold to direct the camera. A ball head like the 488RC2 has a panning control, but any other motion is achieved via the ball, and it may go in any direction; you need to hold the camera directly, too. So a ball head is really not suited for video work; you'll find a pan-tilt head is much easier to work with for that.