Every video on his website has pretty great annotations placed on top of them which describes every section of every video, and all the questions at the end of session QA.

Go to https://handmadehero.org/watch and scroll down the previous episodes section.

Also all the episodes aren't as long as they look, a large chunk of the time is on the QA at the end. That said it is a huge investment at this point, but definitely worth it. Some of his high-level ideas are great, and I've learned a lot.

I'm not following Handmade Hero, but out of curiosity: why does it matter how many sessions are there? It's not like watching Game of Thrones where people can spoil it for you. You can follow the tutorial at your own pace :)

There is an excelent episode guide at https://hero.handmade.network/