Untitled-2

<script>

function tryEl(e) {
  var privEl = document.querySelector('#bitmovinplayer-video-bitmovin-player');

  if (!privEl) {
    window.requestAnimationFrame(tryEl);
  } else {
    removeBackground(privEl);
  }
}

function changeBG(el) {
    var bmovCont = document.querySelector('.bitmovinplayer-container');
    bmovCont.style.backgroundColor = 'transparent';
    el.target.removeEventListener('loadeddata', changeBG);
}

function removeBackground(el) {
  var elListener = el.addEventListener('loadeddata', changeBG);
}

tryEl();

</script>