Robbie Williams may not be familiar to many in the United States, but in his native Britain, he became a huge pop star, performing to adoring crowds and making 14 No. 1 singles. Williams, now 50, produces and narrates his story in “Better Man,” a biopic that seeks to do what he sought obsessively to do from childhood — to entertain. Director Michael Gracey's most audacious move, writes Associated Press critic Jocelyn Noveck, is to present Williams throughout as a CGI monkey, his moves and speaking voice captured by actor Jonno Davies. Mostly, it all works surprisingly well. In theaters.