I created an app specifically designed for Shopify stores, and it was approved today!
https://apps.shopify.com/brisa-videos
Unlike the first version of my app, this version uses a template approach, which made it way easier to create a usable video.
I plan to make a general release later that anyone can use, but Shopify seemed like a good start because sales/marketing is hard, and having a specific group to focus on (eCommerce shop owners) makes it a bit easier to reach out directly to people who would benefit.
Also, launching during the COVID lockdown might not be the best timing :-P