Hoop Dreams
From Wikipedia:
Hoop Dreams is a 1994 documentary film directed by Steve James. It follows the story of two black high school students in Chicago and their dream of becoming professional basketball players.
Originally intended to be a 30-minute short produced for the Public Broadcasting Service, it eventually led to five years of filming and 250 hours of footage. It premiered at the 1994 Sundance Film Festival where it won the Audience Award for Best Documentary. Despite its length (171 minutes) and unlikely commercial genre, it received high critical and popular acclaim. It was on more critics’ top ten lists than any other film that year, including Pulp Fiction, Forrest Gump, The Shawshank Redemption, Heavenly Creatures and Quiz Show.


