Yes, this might look like a giant drone going to the toilet, but it's in fact a very precise industrial process of de-icing huge wind turbines.
In the video it shows in fact that this is a very well thought out process.
This process was previously done by helicopters, which was a pretty expensive activity. It shows how much progress drones have made in the last decade and just in how many fields of activity they can be useful.
The drone weighs 77kg, but it's hooked with a cable to a power source and de-icing fluid tank, so it can basically fly indefinitely.