.bg-video { position: absolute; top: 0; left: 0; height: 100%; width: 100%; z-index: -1; opacity: 0.15;}.bg-video__content { height: 100%; width: 100%; object-fit: cover; // background-size: cover 와 비슷함. (HTML 요소 or 비디오와 작동) }

1.main.htmlDOCTYPE html>html lang="en">head>    meta charset="UTF-8">    meta name="viewport" content="width=device-width, initial-scale=1.0">    title>Documenttitle>    link rel="stylesheet" href="./style.css"/>    link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css"        integrity="sha512-SnH5WK+bZxgPHs44uWIX+LLJAJ9/2PkPKZ5QiAj6Ta86w+fsb2Tkcm..

https://www.youtube.com/watch?v=yU_JgeAIRko&list=PLjwm_8O3suyOwElnplQ3quKEHsOuHyP9R참조 유투브  Features How it works Privacy Log in Download App MakeNew Friends Socially is a new social..