I can’t display custom field in front-end

Hello!
I want to create a custom field that allows the user to add a YouTube link, so that link appears on the front-end when the post is displayed. However, I am not able to display any other fields than default title, the content, and the featured image. Can anybody help me?
I’m working with Bricks builder. Is the any shortcode or somethign to show in fornt custom fields?
Thank you!!