Javascript Full Screen Video Background

<script type="module" src="https://unpkg.com/ionicons@7.1.0/dist/ionicons/ionicons.esm.js"></script>
<script nomodule src="https://unpkg.com/ionicons@7.1.0/dist/ionicons/ionicons.js"></script>

<div class="video-background">
  <video id="bgVideo" autoplay muted loop playsinline>
    <source src="https://cdn.coverr.co/videos/coverr-aerial-view-of-beautiful-resort-2458/1080p.mp4" type="video/mp4">
    Your browser does not support the video tag.
  </video>
</div>

<div class="overlay" id="overlay"></div>

<div class="content">
  <div class="hero-content">
    <h1>Full Screen Video Background</h1>
    <p>Create stunning immersive experiences with full screen video backgrounds. Perfect for landing pages, portfolios, and modern websites.</p>
    <a href="#" class="cta-button">
      <ion-icon name="rocket-outline"></ion-icon>
      Get Started
    </a>
  </div>

  <div class="scroll-indicator">
    <ion-icon name="chevron-down-outline"></ion-icon>
  </div>
</div>

<div class="volume-control">
  <div class="control-btn" id="volumeBtn" title="Toggle Sound">
    <ion-icon name="volume-mute-outline" id="volumeIcon"></ion-icon>
  </div>
  <input type="range" class="volume-slider" id="volumeSlider" min="0" max="100" value="0">
</div>

<div class="video-controls">
  <div class="control-btn" id="playPauseBtn" title="Play/Pause">
    <ion-icon name="pause-outline" id="playIcon"></ion-icon>
  </div>
  <div class="control-btn" id="restartBtn" title="Restart">
    <ion-icon name="refresh-outline"></ion-icon>
  </div>
</div>

      * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            overflow-x: hidden;
        }

        .video-background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: -1;
        }

        #bgVideo {
            position: absolute;
            top: 50%;
            left: 50%;
            min-width: 100%;
            min-height: 100%;
            width: auto;
            height: auto;
            transform: translate(-50%, -50%);
            object-fit: cover;
        }

        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 0;
            transition: background 0.3s;
        }

        .content {
            position: relative;
            z-index: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 40px 20px;
            text-align: center;
            color: white;
        }

        .hero-content {
            max-width: 800px;
        }

        h1 {
            font-size: 64px;
            font-weight: 700;
            margin-bottom: 20px;
            text-shadow: 2px 2px 20px rgba(0, 0, 0, 0.5);
            animation: fadeInUp 0.8s ease-out;
        }

        p {
            font-size: 24px;
            margin-bottom: 40px;
            text-shadow: 1px 1px 10px rgba(0, 0, 0, 0.5);
            line-height: 1.6;
            animation: fadeInUp 0.8s ease-out 0.2s both;
        }

        .cta-button {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: white;
            color: #1a202c;
            text-decoration: none;
            border-radius: 50px;
            font-size: 18px;
            font-weight: 600;
            transition: all 0.3s;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
            animation: fadeInUp 0.8s ease-out 0.4s both;
        }

        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 25px rgba(0, 0, 0, 0.4);
            background: #f7fafc;
        }

        .video-controls {
            position: fixed;
            bottom: 40px;
            right: 40px;
            display: flex;
            gap: 12px;
            z-index: 2;
        }

        .control-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            font-size: 24px;
        }

        .control-btn:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: scale(1.1);
        }

        .control-btn:active {
            transform: scale(0.95);
        }

        .volume-control {
            position: fixed;
            bottom: 40px;
            left: 40px;
            display: flex;
            align-items: center;
            gap: 12px;
            z-index: 2;
        }

        .volume-slider {
            width: 100px;
            height: 6px;
            border-radius: 3px;
            background: rgba(255, 255, 255, 0.3);
            outline: none;
            -webkit-appearance: none;
            cursor: pointer;
        }

        .volume-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: white;
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
        }

        .volume-slider::-moz-range-thumb {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: white;
            cursor: pointer;
            border: none;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .scroll-indicator {
            position: absolute;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%);
            animation: bounce 2s infinite;
        }

        .scroll-indicator ion-icon {
            font-size: 32px;
            color: white;
            filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateX(-50%) translateY(0);
            }
            40% {
                transform: translateX(-50%) translateY(-10px);
            }
            60% {
                transform: translateX(-50%) translateY(-5px);
            }
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 42px;
            }
            
            p {
                font-size: 18px;
            }

            .video-controls {
                bottom: 20px;
                right: 20px;
            }

            .volume-control {
                bottom: 20px;
                left: 20px;
            }

            .control-btn {
                width: 45px;
                height: 45px;
                font-size: 20px;
            }
        }

    const video = document.getElementById('bgVideo');
        const playPauseBtn = document.getElementById('playPauseBtn');
        const playIcon = document.getElementById('playIcon');
        const restartBtn = document.getElementById('restartBtn');
        const volumeBtn = document.getElementById('volumeBtn');
        const volumeIcon = document.getElementById('volumeIcon');
        const volumeSlider = document.getElementById('volumeSlider');
        const overlay = document.getElementById('overlay');

        let isPlaying = true;
        let isMuted = true;

        // Play/Pause functionality
        playPauseBtn.addEventListener('click', () => {
            if (isPlaying) {
                video.pause();
                playIcon.name = 'play-outline';
                isPlaying = false;
            } else {
                video.play();
                playIcon.name = 'pause-outline';
                isPlaying = true;
            }
        });

        // Restart functionality
        restartBtn.addEventListener('click', () => {
            video.currentTime = 0;
            if (!isPlaying) {
                video.play();
                playIcon.name = 'pause-outline';
                isPlaying = true;
            }
        });

        // Volume toggle
        volumeBtn.addEventListener('click', () => {
            if (isMuted) {
                video.muted = false;
                video.volume = volumeSlider.value / 100;
                volumeIcon.name = video.volume > 0.5 ? 'volume-high-outline' : 'volume-low-outline';
                isMuted = false;
                if (volumeSlider.value == 0) {
                    volumeSlider.value = 50;
                    video.volume = 0.5;
                }
            } else {
                video.muted = true;
                volumeIcon.name = 'volume-mute-outline';
                isMuted = true;
            }
        });

        // Volume slider
        volumeSlider.addEventListener('input', (e) => {
            const volume = e.target.value / 100;
            video.volume = volume;
            video.muted = false;
            isMuted = false;
            
            if (volume === 0) {
                volumeIcon.name = 'volume-mute-outline';
            } else if (volume > 0.5) {
                volumeIcon.name = 'volume-high-outline';
            } else {
                volumeIcon.name = 'volume-low-outline';
            }
        });

        // Adjust overlay darkness on scroll
        window.addEventListener('scroll', () => {
            const scrolled = window.scrollY;
            const maxScroll = 300;
            const opacity = Math.min(0.4 + (scrolled / maxScroll) * 0.3, 0.7);
            overlay.style.background = `rgba(0, 0, 0, ${opacity})`;
        });

        // Ensure video plays on load
        video.play().catch(err => {
            console.log('Autoplay prevented:', err);
        });