A few weeks ago I saw the same vehicle flying over my house in Switzerland in a very slow and soundless manner. The time was past midnight. Standing on my balcony I first thought it was a big star until I realized that it was moving towards my direction with two big frontlights and smaller lights on the rear. By all means it was not a helicopter or something similar.
Of course, there are super intelligent beings from other planets or galaxies but most governments in the world refuse to admit its existence because it may cause panic throughout the world! These aliens have been visiting us since ancient time (Falling Angels)!