Use this MotionSites background video as a looping website background asset. Title: Blue Purple Glow Category: background License: 免费 Video URL: https://stream.mux.com/QgTir2Bu4u6d01CqyKEBCks68PIm2nCM7vhwXgenS00tw.m3u8 Local thumbnail: thumbnails/301472d1-5503-4f68-827f-6ac6f74812b3.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.