Embed a theme walkthrough video in the WordPress dashboard

nabm-video-intro.php

<?php
/*
Plugin Name: Nuts and Bolts Video Intro
Plugin URI: WEBSITE URL GOES HERE
Description: Adds a theme overview video to the dashboard homepage. To remove the video, simply deactivate and delete this plugin. The video will still be available via its direct YouTube URL if you need to access it.
Author: Nuts and Bolts Media, LLC
Version: 1.0
Author URI: https://www.nutsandboltsmedia.com
License: GPL-2.0+
License URI: http://www.gnu.org/licenses/gpl-2.0.txt
*/

add_action('wp_dashboard_setup', 'nabm_dashboard_widgets');
 
function nabm_dashboard_widgets() {
global $wp_meta_boxes;
 
wp_add_dashboard_widget('custom_help_widget', 'ENTER A WIDGET TITLE', 'nabm_dashboard_help');
}
 
function nabm_dashboard_help() {
echo '<p>Need help? Contact Nuts and Bolts Media <a href="mailto:info@nutsandboltsmedia.com">here</a>.</p>
EMBED CODE GOES HERE
';
}