those guys are pro... One piloting the drone, the other operating the camera for filming. nothing that one can do alone. On top of this, their drone are home made if I remember well.
This was taken just before Xmas at Stones Winery in Coldstream. A very professional crew, 2 guys 1 flying , 1 filming. Because the venue was near Lilydale Airport the pilot had to be a qualified pilot, flew a Qantas A380 so that probably qualified him. The drone was amazing, guys said 20 knots was the limit though so for windsurfing footage it would be limited.