In this video, I will show you how to use PowerPoint as a screen recorder. PowerPoint has a built-in screen recorder that will save your screen recording to a PowerPoint. You also have the option to save it as an mp4 file from the slide. Add the recording tab to your PowerPoint ribbon to get quick access to all the functions.

This should work for Office 365, PowerPoint 2019, PowerPoint 2016 and Powerpoint 2013 with the update.