Open Question: When's the best time to watch a movie?

Greta Gerwig makes her case.

On the Criterion Channel this month, Greta Gerwig gives an interview for “Adventures In Moviegoing,” an ongoing feature where filmmakers are invited to select some favorite films and talk about them in a length video discussion. (Gerwig’s selections are all unimpeachable: Brief Encounter, The Red Shoes, Yojimbo, Amarcord, Where is the Friend’s House, Na…