Hacker News Reader

This is great. Another good source is Karpathy's recipe: https://karpathy.github.io/2019/04/25/recipe/

Does anyone know an updated version in the age of Transformers?

No, but you can join his Discord here: https://discord.gg/WmsKzRKC (Link expires in a day to prevent bots)

He's very active, as is the community, and I'm sure either they would know a video or be able to answer any questions you have.