The basics of what ketosis is, its benefits and the all important talk about the fear of ketoacidosis. Presentation by a doctor that has been helping people with weight control for over 20 years. Dr Eric Westman.

https://www.youtube.com/watch?v=d09_NZk-wGQ

Makes some interesting comments about cholesterol and A1c blood markers during weight loss.

Edit: The low carb cruise he mentions around the 25 minute mark is already past. My wife and I were on it and met Dr Westman as well as other presenters. The next one next May can be found in the link below and my wife and I are already signed up for it in case anyone is interested in doing it. The whole cruise of five or six thousand people is not low carb. Only a group of around 300 people on the cruise. So it is just a regular cruise that a person can be involved in all the low carb presentations and activities or not at all, as desired.
https://lowcarbcruise.com/