Song from the Free German Youth organization active in the DDR (Communist East Germany) at the time (until 1989, when the wall gave way)
Do you recognize any scenes?
The stadium shot is particularly interesting, as the seats were free if you had time to spend practicing the placard drills (slogan advertising) beforehand.
Die DDR wurde 50 Jahre alt. Hier wurde es gefeiert. (Celebration from the 50th anniversary of the DDR)