A video surveillance system comprising a video management system and one or more digital devices, each of the one or more digital devices being configured to emulate at least one physical video camera, and to send video streams and/or video metadata via a computer network to a video-receiving system, wherein the video management system comprises: an input interface for receiving one or more video streams from one or more video cameras and/or other video sources, a processing unit configured to receive one or more input video streams from the input interface, each input video stream corresponding to one of the received video streams, and to store the input video streams in a video repository, and an output interface configured to send, via a computer network, one or more of the input video streams and/or one or more of the stored video streams to one or more of the digital devices.