‘Andrea Bocelli: Because I Believe’ Review: An Italian Tenor Goes From Childhood Trauma to a Long Reign as Classical Crossover’s Easygoing King

If Andrea Bocelli only laid claim to being the world’s most popular operatic voice, that would be reason enough for a documentary. Any real music lover might take an interest in what goes into the care and feeding of one of the most valuable instruments in the world. Then there’s the additional intrigue of just how Bocelli makes his way through the world, as a sightless person, constantly on the go. Will we find out that he just has twice the usual coterie of celebrity handlers, to help get him to his mark? Or does he navigate all his environments with the same surety with which he commands a stage?

These questions and many more are answered pretty satisfactorily in “Andrea Bocelli: Because I Believe.” Fans will leave satisfied having seen that the maestro lives up to what they hope of him — that Bocelli has conquered everything in his domain,…