1. A system comprising: a subject-perspective camera configured to be worn by a subject to capture subject-perspective video image data indicating a view observed by the subject in an actual environment; a subject-capture camera configured to capture subject-capture video image data of the subject in the actual environment; and a processing system configured to: receive the subject-perspective video image data and the subject-capture video image data; obtain one or more fiducial references captured via the subject-perspective camera in the subject-perspective video image data, the subject-capture camera in the subject-capture video image data, or both, the one or more fiducial references comprising high contrast features that are separate from the subject; generate a perspective video view comprising a perspective of the subject in a virtual setting based upon the view observed by the subject in the actual environment and the one or more fiducial references, wherein the one or more fiducial references are not represented in the virtual setting of the perspective video view; generate a subject-placement video view comprising the subject or a surrogate character representing the subject in the virtual setting, based on a position of the subject in the actual environment, as indicated in the subject-capture video image data and the one or more fiducial references, wherein the one or more fiducial references are not represented in the virtual setting of the subject-placement video view; present the perspective video view to the subject, via a viewer, sufficiently close in time to the capture of the subject-perspective video image data to permit the subject to react to the perspective video view; and present the subject-placement video view to a person other than the subject, to the subject, or to both.