A good digital video camera is one that can get a quality, usable image without much light. This also includes the right balance of receiving and processing both contrast and color. If you are not using any kind of artificial light, such as a portable light kit or a fitted Chimera, you will just have to go with what is on sight in terms of natural light.
Natural light can be an enemy of the videographer because it creates an element in the image that you are not in control of. With this natural light ends up being an unpredictable force that you rely on, and at the same time you can never expect it to act perfectly. There are some ways, however, to deal with low natural light when you are in this kind of situation.