Documentary films have been around since the dawn of the film industry, but what is a documentary? A documentary is a non-fiction story that is told primarily through the eyes of the subject or through interviews with those who know the subject material well. Great documentaries are able to tell incredible stories while tugging at the heartstrings of their viewers, and over the years there have been some remarkable documentaries created on everything from murder trials to inside looks at the animal kingdom.
Source：https://www.cbr.com/10-best-documentaries-of-all-time-to-watch/
