Use this MotionSites background video as a looping website background asset. Title: Background 3 Category: background License: 免费 Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260429_182501_0216c2be-1b2f-40d3-8716-0d4f42e73b44.mp4 Local thumbnail: thumbnails/5270cce4-5ec0-470e-96b6-61037e69147f.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.