The following is a useful summary of key points about the extent of economic, diplomatic and political recovery in Weimar Germany, 1924-1929.
The film embedded from you tube below, is the 1927 classic by Fritz Lang, Metropolis. It has been fully restored and given a more modern soundtrack. Its anti-capitalist themes would have been obvious to German audiences.
Kurt Weill’s 1928 Threepenny Opera was equally controversial, with its Marxist overtones and sexual references. Most of all, its off-beat music was not what German audiences had been used to hearing in concert halls. Weill was ofcourse Jewish and his collaborator Bertolt Brecht and Marxist. The Threepenny Opera remains a classic. The version below is in English.
Other interesting links