of course I already noticed a small error in the bit about basis vectors… sorry! I was rushing to get it done before midnight. I’ll fix it in the morning…
I fixed all the small mistakes and instances of awkward wording I’m aware of, so if you spot something now, it’s probably something I don’t know about.
oh, another thing I forgot until now: I added captions to the video clip. this was far more painful than expected… apparently every browser refuses to display captions or subtitles when viewing the page locally (file:///). what the fuck! I am going to write angry bug reports.