Filters can make a massive difference to your photography, be it still or Video. In this video I look at a Variable Neutral Density Filter, which is like Sunglasses for your lens, but steplessly adjustable to get the exposure you need.
This is not only suitable for cutting down light in still photography where you would like to use a wide lens aperture on a bright day, but it is also really necessary for video, where your shutter speed may be confined to 1/50 or 1/60.
The second filter is a ND100 which cuts out 10 stops of light, allowing you to turn an exposure of 1/125 in to 1 or 2 minutes to get blurred moving objects or movement in clouds, adding a lot of creativity to your images.
The next one I will look at is the Polarizing filter, which I will talk about in another video.
As I stated in the video, I recommend buying filters to fit your largest lens and then buying step-up rings to fit them to your other lenses, saving the need for lots of different filters.