Use this MotionSites background video as a looping website background asset. Title: Prismatic Shift Category: background License: 免费 Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260328_083109_283f3553-e28f-428b-a723-d639c617eb2b.mp4 Local thumbnail: thumbnails/4b1fcae8-8299-4a73-88d3-b5a5cc91bc3a.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.