From our recent Office 365 Evergreen newsletter, I have been playing with this latest update to PowerPoint 2016.
If you like to send your PowerPoint presentations after attendance or perhaps for those who couldn’t attend. Perhaps you use PowerPoint to send instead of Face-to-Face. Adding narrations can really improve a web-based or self-running slide show.
Record your PowerPoint presentation and capture narrations, using a microphone or Webcam. Slide timings and ink gestures are included in the recordings too. After you have made the recording, it's like any other presentation that can be played for you or your audience in Slide Show—or you can save the presentation as a video file and share.
There are some great Recording Tips on this Microsoft Help page too - Make sure you look at the correct update, click the Office 365 tab within the page.