Use this MotionSites background video as a looping website background asset. Title: Crystal Wave Category: background License: 免费 Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260403_050628_c4e32401-fab4-4a27-b7a8-6e9291cd5959.mp4 Local thumbnail: thumbnails/1fd10ceb-1c74-4ee8-9dde-23776830fd83.jpg Implementation requirements: - Render the video as a muted, autoplay, looped, playsInline background layer. - Use object-fit: cover and keep the focal motion visible on desktop and mobile. - Add a readable overlay only when foreground text needs contrast. - Keep controls hidden for decorative background use, and provide a poster/thumbnail fallback. - Respect the MotionSites authorization state before using this asset in a commercial project.