I purchased the A55 several months ago. The camera does auto focus well while shooting video with the 18-55 kit lens. However, the zoom function during video does not work smoothly like on a camera with push button zoom. Because the zoom on the 18-55 lens is so stiff, it is almost impossible to have smooth (not jerky) zooming while taking video shots. Other zoom lenses may be much better, but it is in general it is more of a challenge to get good video from an SLR than it is with a low cost HD video camera.