The first scene is a fairly accurate depiction of the Berghof, Adolf Hitler's mountainside residence near Berchtesgaden and Obersalzberg in Bavaria. The house was famous for its huge picture window which overlooked mountain scenery and was often used to impress visiting foreign VIPs.
As of 2011, this movie has not been released in Germany at all.
Considering the early release date of this movie--August 1940 in the UK and December 1940 in the US--there are many remarkable depictions of the onerous nature of the Nazi system, something not fully appreciated even by UK audiences at the time. The UK had bent over backward to accommodate Adolf Hitler in the late 1930s, and the war had only "gotten serious" a few months earlier with the debacle at Dunkirk in France and the following aerial Battle of Britain, which was well underway when this movie was released. The US would not enter the war for a full year after the December release date.
As noted in the opening caption, the action of the film takes place during the year preceding World War II (beginning with the German invasion of remaining Czech territory on March 15, 1939) and closes on the night of September 3, 1939 (the day that the UK declared war on Germany).
The banner on the city bus stating "BERLIN RAUCHT JUNO" (Berlin smokes Juno) is an advertisement for a cigarette brand later distributed to German soldiers.