Here is the potassium lecture in all its glory.
Keynote (332.4 MB)
PDF (131.8 MB)
If you want to know more about why I allow people to download an editable version of the lecture read this.
The videos are here:
Part One: Introduction 28 minutes
Part Two: Hypokalemia 22 minutes
Addendum to Part Two: Vomiting 10 minutes
Part Three: Hyperkalemia 30 minutes