Most remakes of Motown songs aren’t worth the electricity it takes to run the equipment, but there are exceptions. Like, what would happen if you reassembled the Funk Brothers — not just a band’s worth, all of them who were left as of 2002 — added a choir and an orchestra and put a soulful singer like Joan Osborne at the microphone? That’s what they did for the documentary on the Funk Brothers, “Standing in the Shadows of Motown,” and they got a version of Jimmy Ruffin’s signature song that rivals the original.