Quick jQuery function to remove YT videos from the DOM without IE9 freaking out about memory leaks. The problem is detailed here: https://groups.google.com/forum/#!topic/youtube-api-gdata/2JcIaw43dco

cleanYTRemove.js

/**
 * Safely removes YT player from DOM 
 * @param {object} ytplayer 
 * @param {objext} $wrapper
 * @return {bool}
 */
function cleanYTRemove(ytplayer, $wrapper) {
  // Do shutdown so IE doesn't freak...
  if (typeof ytplayer != 'undefined' && typeof ytplayer.div != 'undefined') {
    // Destroy the Youtube player object
    ytplayer.destroy();
    // Remove src
    $wrapper.find('iframe').attr('src', 'about:blank');
    // Remove container
    $wrapper.remove();
  }
  return true;
}