My wife's 2012 Mazda 5 has a minor noise at highway speed like cupped tires or knobby mud tires are on it, but makes the same noise with the summer or winter set, so is probably not tires. The hub has no free play when you grab the tire and try to wiggle in and out. I spun the hub and it makes a clicking noise - video link below. Is this definitely a bad wheel bearing? The other side makes the same noise but not as pronounced. Car has 85k miles.