Multi-Camera set ups are used when live events/moments are being captured, when it is desired to record many angles simultainiously or when there are other constraints that prohibit using the classic technique of a single camera and styled lighting. One trade-off of using a multi-camera set-up is that you must light a large area for actions to occur and are not able to stylize the lighting for each camera angle as is often preferred in narrative films, documentaries and other types of productions.