Edit: At the end I included a real one I may use.
Linda Brandt reminded me that you can narrate PowerPoint presentations. We should be getting some professional quality videos about how to do this soon but in the meantime here is my version. The hawk catching a rodent has nothing to do with this but since HawkStrikes is canceled this year I wanted to use the image somewhere.
First create your PowerPoint. Then follow the steps here:
Here is MP4 I made with that video:
Here are captioned versions of the two files (I just uploaded to Youtube and accepted the autocaptions.)
Here is a for reals one: