John Carney on pop stars, movie stars, and Power Ballad

Kim Masters talks to John Carney, who after his 2006 indie breakout film Once, has made a career of making movies about musicians making music. Generally, the ones who never got famous. His new film, Power Ballad, stars Paul Rudd as a wedding singer alongside Nick Jonas, who plays a flawed former pop star. Carney discusses his struggles to raise money for his films, and reveals what he says to - or maybe shouts at -  buskers in Dublin who have their amps cranked up to 11.   Plus, Masters and Matt Belloni discuss why Amazon dropped out of distributing Artificial, a movie critical of Open AI. Although initial reactions to a cut of it have been lukewarm, there may be other reasons why Amazon pulled out.