assets/ckeditor/ckeditor-plugin-youtube.php
<?php
return [
'versions' => [
'master' => [
'js' => 'CKEDITOR.plugins.addExternal("youtube", "https://rawgit.yfix.net/fonini/ckeditor-youtube-plugin/master/youtube/plugin.js");',
],
],
'require' => [
'asset' => 'ckeditor',
],
'config' => [
'no_cache' => true,
],
];