cool videos.
your sound levels need increasing.
Not sure if going through the setup at the beginning is actually good for the content because I find it kinda off putting. When I view the github video I want to know "What useful facts will I extract from a Github repo?" first and foremost, i.e. the value prop. I had completely tuned out by the time I got to that content, especially as I had just watched the same thing in the other demo.
You probably think that explaining the setup is lowering friction but it doesn't seem that easy so I would hide that technical setup in a getting started guide and not in the demo vids.