In the montage that opens “Dolores,” there are shots of triumph featuring the documentary’s subject, Dolores Huerta, and a few shots of media types and other folk wondering just who Huerta is. Director Peter Bratt understands her lack of fame, at least in this day and age, creating a cinematic inspection of the labor leader and civil rights activist that’s meant to be a celebration and something of an introduction. It’s a smart way to approach Huerta’s arc of defiance and organization, transforming “Dolores” into a valuable educational tool and an engrossing feature, supported by impressively varied footage of Huerta in action and a slew of interviewees who’ve come together to recount amazing resilience and focus during turbulent decades of injustice and prejudice for Mexican laborers.   Read the rest at Blu-ray.com