There are two different lecture formats: video lectures and slide lectures. The slide lectures are just PDF files with slides you can click through at your own pace. In the video lectures, you will see the same slides on the screen, but I will talk through them, providing additional information and pointing out various features with the cursor. Of course, you can pause or backtrack the video lectures at any time. Each lecture will become an active link when the corresponding file is uploaded.
Update: Taking over a university math department and writing a 450-page book has put this on hold…