<script> const video = document.querySelector('iframe');const videoControls = document.querySelector('.video-controls');const playButton = document.querySelector('play');const pauseButton = document.querySelector('pause');const fullscreenButton = document.querySelector('fullscreen'); const volumeUpButton = document.querySelector('volume-up');const volumeDownButton = document.querySelector('volume-down');videoControls.addEventListener('click', (e) => {const target = e.target;if (target === playButton) {video.play();} else if (target === pauseButton) {video.pause();} else if (target === fullscreenButton) {video.requestFullscreen();} else if (target === volumeUpButton) {video.volume += 0.1;} else if (target === volumeDownButton) {video.volume -= 0.1;}}); </script>