Use this MotionSites background video as a looping website background asset. Title: Abstract Flow Category: background License: 免费 Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260331_074327_a4d6275d-82d9-4c83-bfbe-f1fb2213c17c.mp4 Local thumbnail: thumbnails/ccefa09f-f50f-40f6-ab3d-5892667c4976.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.