Lighting for filming affects the final impression a video makes more than the price of the camera does. The basis is a key light placed at an angle in front of the speaker, supplemented by a weaker light from the opposite side, which softens shadows on the face. A common mistake is filming against a window, which turns the subject into a silhouette, and mixing sources with different colour temperatures, which leaves the image with an unpleasant tint. Daylight from a window, with correct positioning, is a fully adequate and free-of-charge solution, but you need to bear in mind that it changes over the course of the day and causes inconsistency across a multi-part shoot. For companies that film regularly, it is worth setting up one permanent spot with the lighting already set, where another episode can be shot at any time.
See also: Video budget and production, Audio quality, Company video channel.