.thumbnail-preview {
  position:absolute; 
  bottom:50px; transform: translateX(-50%);
  display:none; 
  background:#000; 
  border:1px solid #444; 
  padding:2px; 
  border-radius:4px;
  pointer-events:none;

}
.thumbnail-preview img { width:160px; height:90px; display:block; }

.dplayer-bar-wrap, .dplayer-bar, .dplayer-controller .dplayer-bar-wrap .dplayer-bar .dplayer-loaded, .dplayer-controller .dplayer-bar-wrap .dplayer-bar .dplayer-played{
  height:12px!important;
}