In “Porcelain War,” a resilient Ukrainian couple divide their time between two seemingly antithetical pursuits: When enterprising Slava Leontyev isn’t training fellow civilian soldiers in the ongoing fight against Russia’s invasion, he and his partner Anya Stasenko are skilled ceramic artists, casting and painting dainty porcelain figurines inspired by local nature and folklore. If the title already suggests something pointed in that disparity, this emotive debut by Leontyev and American co-director Brendan Bellomo leaves nothing to chance in ensuring we get it: Porcelain, we are told, is “fragile but everlasting, and can be restored after hundreds of years.” Lest the point still be lost on us, the couple’s combined voiceover later offers a blunter paraphrase: “Ukraine is like porcelain — easy to break, but impossible to destroy.”

The metaphor is clear enough, then. Whether it’s quite complex enough to sustain a feature-length documentary is another question. “Porcelain War” thrives on contrast,...