This are probably the most impressive FPV videos I have seen so far. The pilot skills are outstanding, and so is the video link range. The poster of the videos on youtube did not release the quadcopter specs and apparently is not answering questions right now. From another video, the quadcopter could be an F450 with a very very big battery on in it. Will follow the channel to see if more details are released.
Video 1: Koh Samui Sunset
Video 2: Thailand, Koh Samui, Lamai, 2013