There are at least two artists sharing the name "Semaphore": (1) a post-shoegaze band based in Brooklyn, New York and (2) a rock band based in London, England
These are videos from concerts where Semaphore played, so they may be of other bands that played the concert as well.
The Big Chill Festival 2009 Aug 6 - 9, 2009 Eastnor, UK Added by Maf Daniel