All video cameras have lens controls built into them. You can choose between two setting, wide angle and telephoto. Many amateur videographers commit the mistake of alternating the two setting between frames. The lens control is not there for creating effect. It is simply a feature to ensure the sharp recording of your images.
The wide-angle setting is ideally used for close shooting. It basically captures images with deeper depth of field. On the other hand, telephoto is usually applied to distance shooting. To get better focus on a distant subject, it is best to use telephoto. However it tends to create a more flat image as the depth of field is shallow.