Sondheim in the City is out Friday (Feb. 16), and with it comes a short film for her version of “Good Thing Going” from his magnum opus Merrily We Roll Along. Drawing on Annie Hall (her fashion certainly takes a cue from Diane Keaton’s Oscar-winning role) and French new wave, the “Good Thing Going” mini movie reflects on the dissolution of a romance between an actress and her director. Errico’s phrasing imbues the tale with the bittersweet sense that perhaps this relationship was bound to fail from the start — but still worth mourning.