The Oscar-winning documentary, "The Times of Harvey Milk," is available free for online viewing on Hulu. I watched this ages ago, and it still moves me to this day. Here is the link.
"This Oscar-winning documentary film covers the successful career and tragic assassination of San Francisco's first openly gay man elected to office. Harvey Milk was a controversial figure in American politics, who guided campaigns for civil rights. This documentary chronicles Milk's career in politics, as well as the aftermath and trial of his assassin."