If you need to get an aerial perceptive on a situation, using a quadcopter is a great solution to achieve this as it does not need much space to takeoff and land. Its also useful to see what is in frame of the camera so you know what you are recording, sometimes this can be rather difficult especially if you quadcopter is far away, so adding wireless video to your setup is definitely useful.
To find out more Sam wrote a quick overview on using your gorpo camera for aerial photography and also mentions some other gear such as FPV transmitters and monitors that you should use. If you have any questions just let us know either here on on dronetrest