Growave has a massive automated email system. Once the item is purchased an email with any information you want will be sent. You can adjust the time, the template, design of the email. Besides, it is integrated with Klaviyo and Shopify POS system.
Besides emails, Growave offers Reviews, Wishlist, Rewards, Instagram and 5 more marketing tools all in one.
The best way to reach now a days is WhatsApp.
You should try our WhatsApp Order Notification App, send the notification as soon as customer places an order.
Add the video link in your notification template and it will be sent.
App has free plan for what you are looking for.
All the Best.