Need help completing tutorial regarding lesson3-camvid.ipynb

I am trying to complete this tutorial video Generating Synthetic Data for Image Segmentation with Unity and PyTorch/fastai - YouTube where they are generating synthetic training data. I was doing ok until I got to the point of doing the actual training. The presenter said he used a modified version of lesson3-camvid.ipynb (a link to his modified jupyter script is in the video description). I kept getting errors, and it took me a while to figure out that there are two versions of fastai.

Is there a translation of lesson3-camvid.ipynb to fastai2 somewhere? Would I be better off installing the original fastai? At this point I am just trying to get my bearings on what this is all about. This is my first experience with machine learning in general.

Thanks for any help