Want tutorial video(Sorce coding)

It is not a feature I would like to see included, but I would like to see a tutorial video added to the source code version that actually performs the source editing.
https://www.youtube.com/@Ufe3d/videos
I don't see it posted here yet.
(https://www.youtube.com/watch?v=-6QriL3973k&t=36s
This video only covers up to the upgrade procedure, right?)