A video camera is a device that records moving images and sound, either electronically or chemically, on magnetic tape, optical disc, or other storage media. It uses an image sensor to convert light into electrical signals, which are then processed and stored as digital data. Video cameras can be used for various purposes such as recording events, making movies, broadcasting live shows, and surveillance. They come in different shapes and sizes, from small handheld devices to large, mounted units that require external power sources or additional equipment like remote controls and monitors.