A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Hello there,
Thanks for reaching out here regarding this query.
I am pretty sure this is content-related somehow, and perhaps there's a glitch or change in the system where a certain kind of object is either no longer supported or there's a bug.
Microsoft has many Macs and they can use them for testing. You might offer your presentation to them for testing. Use the Menu Bar in PowerPoint and choose Help > Feedback > I Don't Like something.
Explain the situation and offer to provide your presentation for testing. Be sure to include your contact information.
Meanwhile, you can try converting a different ppt file to mp4 and see if the issue persists.
Warm regards, Albert