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<div class="video-section"> <div class="video-wrapper"> <iframe data-src="https://www.youtube.com/embed/vr2PMQagF5E?rel=0&mute=1&loop=1" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe> </div> </div> <script> const video = document.querySelector('iframe[data-src]'); if (video) { const observer = new IntersectionObserver((entries, observer) => { entries.forEach(entry => { if (entry.isIntersecting) { video.src = video.getAttribute('data-src'); observer.unobserve(video); } }); }); observer.observe(video); } </script>