If there's an audio or video clip in a PowerPoint file that you want to reuse elsewhere, you can do so by saving the clip as a separate media file (.mp4 or .m4a).
On macOS, this feature is only available to Microsoft 365 subscribers. It's available beginning with version 16.24. In earlier of versions of PowerPoint for macOS, the ability to extract media files isn't available.
Right-click (or Control-click on macOS) the audio icon or video, and click Save Media as.
Tip: Ensure your disk has enough space to save the media file, otherwise you'll have to free up space and try again.
In the Save Media as dialog box, choose a folder and also enter a name for the media file.
If the Save Media as option doesn't appear on the menu, then you have an older version of PowerPoint that doesn't support this feature.
Note: Starting in PowerPoint for Windows version 2211 and PowerPoint for Mac 16.67, if closed captions or subtitles in separate files have been inserted for the audio or video, then those files will also be saved alongside the audio or video file. All the files will be saved into a new folder with the name that you specify.
Install updates for PowerPoint 2013 to use this feature
If you're using PowerPoint 2013, make sure you have the necessary updates to it installed so that you can save a media file.
Check the following:
Install 15.0.4641.1001 or later for the Click-to-run version.
Once you have installed the correct updates, you can save the media file.