[Theme Horse Support Team]

Ok we think you have directly used the embedded code. Please wrap the embedded code with the class ’embed-responsive’ and ’embed-responsive-16by9′.

Example

<div class="embed-responsive embed-responsive-16by9">
  (Paste your embedded code here)
</div>

Please paste the embedded code as mentioned above.

OR

If you are using the WordPress 5+ then you can use the Embeds Block Features of Gutenberg on the page/post editor page which will be very easy to use the embedded code with out any HTML code customization.

Thanks