The first rule of using the lens is don’t zoom. Keep your finger off the zoom button while you’re filming. Just use it to set the lens before you start shooting.
If you have a basic camera, it probably has a button with ‘W’ and ‘T’ settings on it. Or it might have a picture of a landscape and a picture of a portrait. W stands for wide angle and T stands for telephoto. (Some cameras have fixed lenses, and many pro filmmakers use prime lenses – these don’t zoom, you swap the lens to get wideangle or telephoto shots).