Last month there was “Songbird.” It was a tale of lovers separated by the continued devastation of COVID-19, offering viewers a look at the near-future where things remain horrible around an increasingly policed and hostile world. It was the first major offering of pandemic exploration during a pandemic, and it was a terrible film. Now there’s “Locked Down,” which isn’t a slice of dystopian misery, but an in-the-moment take on COVID-19 habits and relationship realizations, with writer Steven Knight (“Serenity,” “The Girl in the Spider’s Web”) basically mounting a play about the pressure cooker environment of cohabitation during a time of inescapable living situations. Director Doug Liman is known for his restless style and tight storytelling abilities, but he can’t get past the inherent heaviness of “Locked Down,” which tries to play brightly, at least passably so, but it’s dealing with grimness, and not well, with Knight offering scattered ideas and characters existing in a global health situation that still has yet to take a defined shape. Read the rest at Blu-ray.com