ember glow（ca28918f）

Use this MotionSites background video as a looping website background asset.
Title: Ember Glow
Category: background
License: 付费
Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260405_073438_071156e5-2a7a-45d8-a8d9-c628d2144e88.mp4
Local thumbnail: thumbnails/ca28918f-ac79-445c-adc8-b0e2f8623897.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.