In 1950 documentary style film ‘Daybreak in Udi’ won an Academy Award (Oscar) for best feature documentary , BAFTA Film Award [Winner] (1950)Best Documentary Film and the UN Award [Nominee] (1950).
This 47-minute documentary, financed by HRH’s government “Day Break in UDI” (1949) highlights the effort of a small community to build a maternity center amidst the opposition of some village men. The British colonial officer in charge of the Udi and Awgu, Enugu district was asked to help in the project. He helped and provided materials and motivation for the community. But in the end, it the villagers willingness to bring change and improve their community that triumphed. Filmed in Nigerian village of Udi in 1949, it is the first Nigerian movie to win an Oscar .
Most of the it was later edited into a 1953 two-segment documentary called “Savage World” by the same crew of film-makers listed on this film.
Authors-choice: Hope & Revival 
That’s interesting piece of info – as early as 1950!