embed youtube video auto height

1<!-- CSS -->
2<style>
3.video-container {
4    position: relative;
5    padding-bottom: 56.25%; /* 16:9 */
6    height: 0;
7}
8.video-container iframe {
9    position: absolute;
10    top: 0;
11    left: 0;
12    width: 100%;
13    height: 100%;
14}
15</style>
16
17
18<!-- HTML -->
19<div class="video-container">
20    <iframe width="560" height="315" src="https://www.youtube.com/embed/_TyJeKKQh-s?controls=0" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
21    </div>