Interesting background info:
The building shown in the video is a hydroelectric power station built 120 years ago and still in operation today. It has been nominated for the UNESCO World Cultural Heritage List. The four metre high flywheel used for power generation was shown at the World Exhibition in Paris in 1900 as a "symbol of German technical architecture". Today the plant is used as a hydroelectric power station, residential and office building. Its energy generation is still fed into the public power grid.