css 使用iFrame的响应式YouTube和Vimeo视频 - 来自https://www.ostraining.com/blog/coding/responsive-videos/

Posted 2021-05-13

.video-responsive {
    overflow:hidden;
    padding-bottom:56.25%;
    position:relative;
    height:0;
}

.video-responsive iframe {
    left:0;
    top:0;
    height:100%;
    width:100%;
    position:absolute;
}