Writer/director Joe Swanberg makes tiny movies. He’s built an impressively determined filmography of no-budget productions, some that remain quite obscure, while others, boosted by star power, have reached the art-house circuit, connecting with audiences on the prowl for modest but meaningful stories about feelings and fears, such as last year’s “Drinking Buddies.” “Happy Christmas” goes out of its way to articulate a loose sense of conflict, but Swanberg’s intent is crystal clear, crafting a fidgety picture that’s flush with human behavior. It’s not focused in any traditional manner, but little portions of comedy and domestic tension get the feature where it needs to go, even if the destination is nowhere in particular. Read the rest at Blu-ray.com