Noah Baumbach (“The Squid and the Whale,” “Margot at the Wedding,” “The Meyerowitz Stories”) talks about how and why he makes movies. Through equal parts comedy and drama, Baumbach’s films frequently deal with the pains of family life with stunning clarity. His most recent film “Marriage Story,” now nominated for six Academy Awards including Best Picture, explores the complicated fallout of a failing coast-to-coast marriage.