Simple Wire Color Question

Hey, I've got a real simple newb question here. So I was watching a flite test episode where Josh and Peter make a micro fpv camera and transmitter setup and they used a camera with a red (hot), black (ground), and white (video) wire. But a lot of the cameras I see have a red black yellow and white cable, or a red black and yellow cable. How would I use cameras like these? Is white or yellow the video cable on a four wired camera?
-Thanks

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