feat: add heroku migration guide video to heroku migration guide page

apps/reference/docs/guides/migrations/heroku.mdx

@@ -7,6 +7,17 @@ sidebar_label: Heroku
 
 Supabase is one of the best [free alternatives to Heroku Postgres](https://supabase.com/alternatives/supabase-vs-heroku-postgres). This guide shows how to migrate your Heroku Postgres database to Supabase. This migration requires the [pg_dump](https://www.postgresql.org/docs/current/app-pgdump.html) and [psql](https://www.postgresql.org/docs/current/app-psql.html) CLI tools, which are installed automatically as part of the complete PostgreSQL installation package. 
 
+## Quick demo
+
+<div class="video-container">
+  <iframe
+    src="https://www.youtube-nocookie.com/embed/xsRhPMphtZ4"
+    frameBorder="1"
+    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+    allowFullScreen
+  ></iframe>
+</div>
+
 ## Retrieve your Heroku database credentials {#retrieve-heroku-credentials}
 
 1. Log in to your [Heroku account](https://heroku.com) and select the project you want to migrate.