As you may know I don't use textbooks in my courses anymore. Instead I make my own video lectures and make the corresponding slides accessible. Inspired by Engineering Mathematics: YouTube Workbook I have now organized the slides from one of my courses into a "YouTube textbook".
It's mostly in Danish but a few subsections are in English. I am working on a fully English version where the bottleneck is re-recording the videos. You can see the progress here.
This work is licensed under a Creative Commons Attribution 4.0