A plurality of cameras (103) observe a space (101) and provide real-time video signals (S). A local server (201) receives the signals (S) and generates virtual video signals for transmission over the Internet (303) to remote users' devices (305). Each remote user is provided with an interface (401) for virtual navigation within the space (101). Upon receiving a remote user's navigation command, the local server (201) adjusts the virtual video signal to show what the user would see if the user were actually moving within the space (101). The virtual video signal is produced for each user, so that the users can virtually navigate independently.
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