The short video below outlines the essentials of preparing a presentation-based ‘explainer’ video.
Our presenter here is reading from a script, which she can see on a teleprompter. This can be the full text of the presentation or, if your presenter would prefer, a bullet-list of essential points per visible slide.
Our presenter here had not rehearsed and had not even seen the script before recording the video, which took only a single take to complete. This is a good example of how painless this method is.