Your camcorder can probably accept some lens filters which screw on in front of the lens. Filters can be used to improve various lighting situations. For example, if you are shooting outdoors in a brightly sunlit location, you may find that colors look kind of washed out in the light. A neutral-density filter can compensate for the light and improve the way colors look.
Other lens filters can provide special lighting effects. For example, a star filter causes star patterns to shoot out from light points that appear in the image. This can give the scene a magical look. For more on how lens filters can change and improve the way your video images look, check out the Tiffen Web site at www.tiffen.com.