Use this MotionSites background video as a looping website background asset. Title: Motion BG 59 Category: background License: 免费 Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260422_112520_ee819691-f2e8-4c54-bb77-3fb72c84eaa5.mp4 Local thumbnail: thumbnails/98f359af-5424-4f4f-8ea1-1c5759def53b.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.