Active Project Walkthrough Resources

Hi,

Does anyone know any resources people have created that specifically walk through large active projects?

For example, are there any blog posts or YouTube videos that walk through the FreeCodeCamp repository on GitHub?

I feel like a walkthrough of a large project would be interesting, since it would have to talk about small and large architectural decisions at the same time.

I haven’t been able to find any of these types of resources, but I might just not be looking in the right places.