Hi Robert.
I do not think that creating a video would have any meaning.
DIV addon is used to group several addons and create mini layouts. Unlike the sections or columns, it has a simple code structure without additional internal elements and styles. What makes it more convenient for mini layouts than sections and columns.
The simplest example of use is by placing two buttons in DIV addon you can place them horizontally and align them.
However, the DIV addon settings are very poor, not flexible and have some bugs. To reveal all its potential, it is better to use CSS using your own classes. To do this, you must have good HTML/CSS skills. And having these skills, you will easily understand how and in what cases it is used without any video.
But if you do not have these skills, it is not possible to create a video that would be useful for you. Since to understand even those settings that exist, you need to know Flexbox CSS at least