gradient wave

Use this MotionSites background video as a looping website background asset.
Title: Gradient Wave
Category: background
License: 免费
Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260330_145725_08886141-ed95-4a8e-8d6d-b75eaadce638.mp4
Local thumbnail: thumbnails/da30bad4-292b-4f7e-8918-bc96df5de890.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.