This tutorial shows how to narrate a PowerPoint using O365.
Then, Save As- Export to a video file type to upload to Kaltura.
Uploading to Kaltura allows you to submit the video so the viewer can easily watch your Presentation using the Kaltura player in Canvas.
This method is an alternative to using the ScreenCapture tool in Kaltura.
Narrating in PPT gives you more control to redo mistakes without having to start completely over.