I would like to recommend a series of documentaries that have marked me deeply, to leave their realism, with footage broadcast completely in color, and whose rendering is stunning. It is the series of the Apocalypse, broadcast on France 2 in 2014 for the part on the 1st World War. While the part about World War II were released in 2009. The narrator for the 2 parts of the French version is Mathieu Kassovitz.
The atmosphere of the fighting, territorial tensions, the game empires and monarchies, is perfectly described, without superfluous and without bias, as is unfortunately the case for many historians. More narration is simplistic enough, to allow the Viewer to safely follow the course of history. This documentary is for everyone, except for the youngest among us.