[geodel]

I mean it has many diagrams and logical explanation of Goroutines and concurrency concepts in general but it is definitely not under the hood descriptions.

[geertj]

I came here to write the same thing. Things I had hoped this would go into is how goroutines grow their stacks, and how they are preempted.

[ignoramous]

There you go: Vicki Niu, Goroutines: Under the hood, https://www.youtube-nocookie.com/embed/S-MaTH8WpOM (2020).