It’s not just the camera that separates a professional-looking video from an amateur one. You need excellent and proper lighting, too, and it all begins with a strong grasp of three-point lighting. This video explains what you need to know in a bit over two minutes.
The basic setup for three-point studio lighting is fairly straightforward. All you need is a background, a key or main light, a fill light and a hair light. The lights can be strobes or continuous but for the best and most consistent results I prefer strobes.