I haven’t yet seen the new Coen Brothers film, Inside Llewyn Davis, that serves as the inspiration for this concert film (the subtitle of which is Celebrating the Music of ‘Inside Llewyn Davis’). But I have seen this special, and it’s fabulous. Oscar Isaac, who stars in the film, sings several numbers (including one, shown here, with Marcus Mumford), and other performers include Joan Baez and, a new treat for me, the Milk Carton Kids.