นี่คือ สุดยอด code up date ทำให้ youtube ใน wordpress ของคุณ เป็น responsive

https://mediarealm.com.au/articles/wordpress-responsive-youtube-embeds/

functions.php

<?php
add_filter('the_content', function($content) {
return str_replace(array("<iframe", "</iframe>"), array('<div class="iframe-container"><iframe', "</iframe></div>"), $content);
});
add_filter('embed_oembed_html', function ($html, $url, $attr, $post_id) {
if(strpos($html, 'youtube.com') !== false || strpos($html, 'youtu.be') !== false){
return '<div class="embed-responsive embed-responsive-16by9">' . $html . '</div>';
} else {
return $html;
}
}, 10, 4);
add_filter('embed_oembed_html', function($code) {
return str_replace('<iframe', '<iframe class="embed-responsive-item" ', $code);
});

css

 .embed-responsive {
  position: relative;
  display: block;
  height: 0;

  padding: 0;

  overflow: hidden;

}

.embed-responsive .embed-responsive-item,

.embed-responsive iframe {

  position: absolute;

  top: 0;

  bottom: 0;

  left: 0;

  width: 100%;

  height: 100%;

  border: 0;

}

.embed-responsive-16by9 {

  padding-bottom: 56.25%;

}