HBO's ‘Showbiz Kids’ attempts to shine a light on the dark side of child stardom

Showbiz Kids opens with a statistic: "Every year, over 20,000 child actors audition for roles in Hollywood. Ninety-five percent of them don't book a single job." The new HBO documentary decides to focus primarily on the five percent of young actors who do get roles (and big ones, too) by pasting together archival news footage,...