The building shown briefly at 11:20 as the "Nato Headquarters, Brussels, Belgium" is in fact The Chancellery of the President of the Republic of Poland (Polish: Kancelaria Prezydenta Rzeczypospolitej Polskiej), in Warsaw, instituted in 1989, is a governmental institution composed of the immediate staff of the President of Poland that assists and is governed by the President. The objective of the Chancellery is to provide assistance to the President in its multiple echelons of staff, which include the Presidential cabinet and the Chancellery of National Security. You can tell it's a Polish government building by Polish flags flying everywhere, next to NATO flags.