In exclusive video, Brad Pitt and others explain ‘The Tree of Life’

It’s been one of the bigger cinematic mysteries ever since buzz around the movie intensified last year — just what exactly is “The Tree of Life” about? Terrence Malick’s new film, as those of us who saw it in Cannes described, grapples with many subjects — love and family, nature and religion, sadness and suffering. In this new exclusive video, actors Brad Pitt and Jessica Chastain, along with the film’s producers, walk us through clips and moments in one of the spring’s most anticipated films.