For the newest slate of online store additions, today’s titles consist of the following trio: Sarah Polley’s “Stories We Tell,” John Dahl’s “Red Rock West,” and Werner Herzog’s “My Son, My Son, What Have Ye Done?” Supposedly based on the details of an actual crime (fans of Herzog and his philosophy of “ecstatic truth” know to take any such claims with a boulder of salt), “My Son…” was the first feature the director shot with the digital RED camera, which Herzog seems to have disliked. Whether the finished product suffered as a result is for you to decide; I, for one, certainly don’t think that’s the case.