In April 2011 , the band joined Mumford & Sons and Old Crow Medicine Show on the Railroad Revival Tour . According to '' American Songwriter '' , the tour stopped in six cities , playing alternative venues such as an Austin , Texas high school where Mumford & Sons taught the marching band how to play their hit " The Cave " . The tour was also the subject of Grammy-nominated director Emmett Malloy 's latest documentary '' Big Easy Express '' , which strove to capture " the pure joy of music " through Americana folk imagery . The documentary went on to win in the category for Best Long Form Music Video at the 2013 Grammy Awards . In 2011 , Railroad Revival Tour bands Mumford & Sons , Edward Sharpe and the Magnetic Zeros , and Old Crow Medicine Show together closed their shows at every stop with " This Train "
2013 Grammy Awards
55th Annual Grammy Awards
Edward Sharpe and the Magnetic Zeros