Thanks for your reply.
We found the solution today!
The modification was originally only added to the Schema theme: styling options > custom CSS form.
We now added it in the WordPress dashboard: Appearance > Customize > Additional CSS
and it’s working.
Thanks for the additional info Joy. I will look into including the necessary info in a plugin that I can install in the new theme.
Have a Happy New Year.
Thanks for your reply Joy.
Could you explain a bit further please. I am not a coder.
Is there a plugin which might include that type of YT short code and would
reenable it in my new theme after installing?
Thanks again.
Ah…ofcourse. Had a WP brain freeze. Thanks for your quick response. All set and working now.
Best