1. A method comprising: receiving frames of video data that are being captured by a video camera and that are representative of an ongoing scene, the video camera having one or more adjustable video-capture settings; identifying a persona in one or more of the received frames at least in part by identifying, in each such frame, a set of pixels classified as being representative of the persona; selecting, based collectively on brightness values of the pixels in the identified set, a respective adjustment command for one or more of the adjustable video-capture settings; and outputting the selected adjustment commands to the video camera for use by the video camera in continuing to capture video data representative of the ongoing scene.