Issue #3281357: Add ability to modify the embed options

src/UrlEmbed.php

@@ -44,6 +44,7 @@ class UrlEmbed implements UrlEmbedInterface {
    * @{inheritdoc}
    */
   public function getEmbed($request, array $config = []) {
+    \Drupal::moduleHandler()->invokeAll('url_embed_options_alter', [$request, &$config]);
     return Embed::create($request, $config ?: $this->config);
   }