cosmic drift（c4a39d33）

Use this MotionSites background video as a looping website background asset.
Title: Cosmic Drift
Category: background
License: 付费
Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260407_043131_ebe2f0b5-9acc-4a4f-b2c1-7297f1a3beb9.mp4
Local thumbnail: thumbnails/c4a39d33-a019-445f-8161-6bd3be493550.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.