Use this MotionSites background video as a looping website background asset. Title: Motion Background 15 Category: background License: 免费 Video URL: https://d8j0ntlcm91z4.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/hf_20260520_133010_cb9c806d-bc9d-47f1-ac4c-b1759134ec8b.mp4 Local thumbnail: thumbnails/6308a7b0-e2be-438f-b502-2932323f0217.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.