DVR mode is a feature on certain Stealth Cam models that allows them to function like a digital video recorder. When activated, the camera will continuously record video footage, overriding pictures on the camera card if it fills up. This mode is optional but would be very beneficial if the camera is being used as a security trail camera. It is not clear from the sources what specific steps are required to activate DVR mode on a Stealth Cam. However, it is likely that the user would need to access the cameras programming options to set it up.