The raucous period drama “Firebrand” was the official opening-night film at the 57th annual Karlovy Vary International Film Festival on Friday night in the spa resort town outside Prague, but there was a lot more going on in and around the Grand Hall at the Hotel Thermal than just the on-screen battle between Alicia Vikander’s Catherine Parr and Jude Law’s King Henry VIII. It also included the presentation of awards to Vikander and Russell Crowe, the usual complement of opening-night speeches, an extended dance number that appeared to be performed on ice skates (though it wasn’t on ice but on an artificial surface that mimicked ice but could be walked on safely) and, during breaks and after the movie, complete concerts by the British band Morcheeba and by Crowe’s nine-piece band, Indoor Garden Party.