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In the US it is “illegal” to fly a drone above 400 feet and/or out of line of sight. If you are not a law-abiding citizen you can fly it 20 to 30 miles away and to the limit of the flight envelop of the aircraft.

“Video piloting (first-person view)”
http://en.wikipedia.org/wiki/Radio-controlled_aircraft

First-person view (FPV) flight is a type of remote-control flying that has grown in popularity in recent years. It involves mounting a small video camera and television transmitter on an RC aircraft and flying by means of a live video down-link, commonly displayed on video goggles or a portable LCD screen. When flying FPV, the pilot sees from the aircraft’s perspective, and does not even have to look at the model. As a result, FPV aircraft can be flown well beyond visual range, limited only by the range of the remote control and video transmitter. Video transmitters typically operate at a power level between 200 mW and 1500 mW. The most common frequencies used for video transmission are 900 MHz, 1.2 GHz, 2.4 GHz, and 5.8 GHz.[5] Specialized long-range UHF control systems operating at 433 MHz (for amateur radio licensees only) or 869 MHz[5] are commonly used to achieve greater control range, while the use of directional, high-gain antennas increases video range. Sophisticated setups are capable of achieving a range of 20–30 miles or more.[6]

A basic FPV system consists of a camera, video transmitter, video receiver, and a display. More advanced setups commonly add in specialized hardware, including on-screen displays with GPS navigation and flight data, stabilization systems, and autopilot devices with “return to home” capability—allowing the aircraft to fly back to its starting point on its own in the event of signal loss. On-board cameras can be equipped with a pan and tilt mount, which when coupled with video goggles and “head tracking” devices creates a truly immersive, first-person experience, as if the pilot was actually sitting in the cockpit of the RC aircraft.[5]

Both helicopters and fixed-wing RC aircraft are used for FPV flight. The most commonly chosen airframes for FPV planes are larger models with sufficient payload space for the video equipment and large wings capable of supporting the extra weight. Pusher-propeller planes are preferred so that the propeller is not in view of the camera. “Flying wing” designs are also popular for FPV, as they provide the best combination of large wing surface area, speed, maneuverability, and gliding ability. FPV aircraft are frequently used for aerial photography and videography, and many videos of FPV flights can be found on popular video sites such as YouTube and Vimeo.

In the United States, the Academy of Model Aeronautics’ own safety code forbids the pilot of the model from observing its flight solely with onboard video, requiring the modeler to strictly use their own natural vision, only augmented by corrective eyewear when prescribed, throughout the flight to observe and safely control the model.[7]