Use this MotionSites background video as a looping website background asset. Title: Motion Background 4 Category: background License: 免费 Video URL: https://customer-cbeadsgr09pnsezs.cloudflarestream.com/12a9780eeb1ea015801a5f55cf2e9d3d/manifest/video.m3u8 Local thumbnail: thumbnails/8120f4ef-60c9-4969-b96e-d6f2aec15d8d.png 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.