Hey there,
in the lecture Creating Bushes Grant explained the use of geometry nodes at the beginning and also said that he might create a geometry node course in the future, then link it to this lecture.
Just a friendly reminder, that now we have a geometry nodes course (which I probably will work on after this course). If some of the admins feel like it maybe you can link to the Geometry Nodes Course in the resources tab where Grants Youtube video is also linked.
If this thread shows up at the video I guess ive just done the job in a sense 
Cheers,
Kevin