/* Your existing container styles */
  .djvideo-container {
    position: relative;
    padding-bottom: 42.85%;
    height: 0;
    overflow: hidden;
    border: 9px solid #000000;
    border-radius: 15px;
    box-sizing: border-box;
    max-height: 400px;
    cursor: pointer;
  }
  
  .video-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
 
  /* Your existing overlay styles */
  .video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2;
    transition: opacity 0.3s ease;
  }

/* Your existing hover effect */
  .video-wrapper:hover .video-overlay {
    opacity: 0;
  }

/* --- New Styles for the Thumbnail and Play Button --- */
  .video-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    width: 60px;
    height: 42px;
    background-color: #ff0000;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.2s ease, filter 0.2s ease;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
  }

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
    filter: brightness(1.2);
  }

.play-button::before {
    content: '';
    position: absolute;
    left: 55%;
    transform: translateX(-55%);
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #ffffff;
  }

/* --- *** IMPORTANT NEW RULE *** --- */
  /* This rule makes the iframe fill its parent container */
  .djvideo-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
</style>

// Replace the container's content with the iframe
    container.innerHTML = iframeHtml;
    // Add a class to indicate the video has been loaded
    container.classList.add('video-loaded');
  }
</script>

Shadowj DOM Test

Shadow DOM Test No height adjust