JSFiddle - React, Tailwind, and code Playground
by Kocsten
HTML
<h1>CSS - Адаптивное Видео</h1>
<div class="video-responsive">
<iframe width="560" height="315" src="https://www.youtube.com/embed/-8uEKq9EXNM" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</div>
CSS
.video-responsive {
position: relative;
padding-bottom: 56.25%;
height: 0;
overflow:hidden;
}
.video-responsive iframe,
.video-responsive object,
.video-responsive embed {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}