Review: ‘Sidney’ does justice to Sidney Poitier’s remarkable life and trailblazing career

In theory there's only so much to be done with a celebrity biography, but when the subject is Sidney Poitier, that's an unusually target-rich environment. "Sidney," a documentary from director Reginald Hudlin produced by Oprah Winfrey, does the actor justice, providing context, depth and considerable warmth in chronicling his remarkable life and trailblazing career.