# Understanding PyTorch Buffers - [understanding-buffers.ipynb](understanding-buffers.ipynb) explains the idea behind PyTorch buffers, which are used to implement the causal attention mechanism in chapter 3
Below is a hands-on video tutorial I recorded to explain the code:

[![Link to the video](https://img.youtube.com/vi/PetlIokI9Ao/0.jpg)](https://www.youtube.com/watch?v=PetlIokI9Ao)