I absolutely love NerdCalci! It's simple and gives the same line by line file-based format.

https://github.com/vishaltelangre/NerdCalci

Also on windows I used to use SpeQ.

Have you tried the Firefox extension "Video Background Play Fix"?

This has worked flawlessly for me on every phone I've used.

Making a little static site to document the AV setup at my church.

Started with just an html page with buttons for shortcuts. Added a few paragraphs and then got tired of writing html. Not many simple wysiwyg desktop html editors surprisingly.

Then discovered Zola, a static site generator that takes md files as content, and adds them to template html files.

Perfect for my little use case. I'm having fun with it :D