Hey there,

If I understand your question correctly, do you mean that the embedded Youtube block is unable to load your youtube URL in the composer as shown in the screenshot (but the screenshot is successful)?

Can you share me the youtube URL that you want to put into it?

It seems that when I was trying to access your backend https://japantouring.com/administrator/?matsuzaki, it will redirect me to https://japantouring.com/installation/index.php with error message of " Error 403 - Forbidden You don't have permission to access the requested resource. Please contact the web site owner for further assistance."

Also, can you provide us with your FTP's access so that we can have a better check and troubleshoot it for you?