On large sites multiple video walls can be deployed in different control rooms, all accessing the same video from any camera or Network Video Recorder ... such as the status of access control or ...

from home security cameras and dash cams to the camera on your phone. Called EM Eye, short for Electromagnetic Eye, the technique can capture the video from another person's camera through walls ...

If you're renting in an apartment building or similar ... big problems with installing a security camera in your apartment ...