What is the "Server Side Scripting" DocType in the "Programming" module?

This video from last May by D-code

Reports II - Query Report

… demonstrates how to create a Query Report using an SQL query on the table:

`tabServer Side Scripting`

It refers to a module “Programming”.

Qs:

Is that module proprietary?

Where can I find more about it?

I see now.

You have to watch the whole series where they have you develop that module yourself.