Self-made hexacopter

"Dieses ist ein Selbstbau-Projekt rund um einen Mikrokopter." translates to "This is a self-made project for a microcopter."

In the left navigation panel you can find "Nachbau-Anleitung", which gives you detailed instructions on how to build such a thing yourself.

If my understanding of it is correct the people that run the site and that made the video actually designed the thing and offer kits and bits & pieces for sale.

Their store has the weirdest notice I've ever seen on a website:

"For legal restrictions it is not possible for us to translate the article descriptions and most of the other pages directly - sorry. "