[HTML/CSS] 배경화면에 영상 넣기

	<div class="bg-video">
  		<video class="bg-video__content" autoplay muted loop>
   		 <source src="${pageContext.request.contextPath}/resources/images/login_bg_video.mp4" type="video/mp4" />
  		</video>
	</div>

.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)
  
}