I thought the limits were 500m distance and 400' height both of which appear to have been exceeded here. God knows how you can see a drone at 500m in order to control it though. I couldn't manage that with a 6ft span radio controlled aeroplane so no chance with a biddy little drone. imo they're a menace to low level aviation.
If I was still flying helicopters these things would be giving me sleepless nights, sooner or later one of these things operating outside its parameters will take a law-abiding helicopter out, or some prat will use one on the Mach Loop to get better pics. Just wait!