I love using Tella for my explainer and coaching videos, but some platforms don't work with Tella's custom domain feature.
You have to manually change the URL from your custom domain back to Tella's for it to embed properly.
So I created a keyboard shortcut to automatically do the find/replace on my clipboard before I paste the URL for embedding.
Here's how I did it with Keyboard Maestro, but I also build an Apple Shortcut to do it. Get them both in my free automations database: https://casabona.org/automations