A demo of how you can use server side ad insertion with the player

var conf = {
  key: '<YOUR PLAYER KEY>'
};

var source = {
  dash: 'https://bitmovin-a.akamaihd.net/498364_fcb0257026d0bd3ee0ba3aad95674188/manifest.mpd',
  hls: 'https://bitmovin-a.akamaihd.net/498364_fcb0257026d0bd3ee0ba3aad95674188/playlist.m3u8',
  poster: 'https://bitmovin-a.akamaihd.net/498364_fcb0257026d0bd3ee0ba3aad95674188/poster.jpg'
};

var hidden = false;
var played = false;

var playerContainer = document.getElementById('player-container');
bitmovin.player.Player.addModule(bitmovin.analytics.PlayerModule);
var player = new bitmovin.player.Player(playerContainer, conf);

player.load(source).then(function () {
  player.on(bitmovin.player.PlayerEvent.TimeChanged, function (data) {
    if (player.getCurrentTime() >= 29.081333 && player.getCurrentTime() < 41.138666) {
      document.getElementsByClassName('bmpui-ui-container bmpui-controlbar-top')[0].style.display = 'none';
      hidden = true;
      played = true;
    } else if (hidden) {
      document.getElementsByClassName('bmpui-ui-container bmpui-controlbar-top')[0].style.display = 'block';
    }
  });

  player.on(bitmovin.player.PlayerEvent.Seek, function (data) {
    if (data.seekTarget > 29 && !played
    ) {
      player.seek(29);
      played = true;
    }
  });
});