.video_bg_section>*{position:relative;z-index:10}.video_bg_section>.video_bg_wrapper{position:absolute;left:0;top:0;bottom:0;right:0;z-index:0}.video_bg_section>.video_bg_wrapper .video_bg{width:100%;height:100%;position:relative}.video_bg>picture{position:absolute;top:0;left:0;bottom:0;right:0;width:100%;height:100%}.video_bg>video{opacity:0;transition:all 1s ease}.video_bg.video_loaded>video{opacity:1}