I know he has Jupyter themes installed but I see cool things like green blinking cursor position when a word is highlighted and foldable cells/sections.
Could we get a list of these little but nice add-ons to boost productivity in Jupyter notebooks?
I am not sure exactly which all did he use but I found something for folding code into sections. https://github.com/ipython-contrib/jupyter_contrib_nbextensions
There are others in that link that are nice.