HI Kaitlyn,
Thank you for writing to us here in the Microsoft community.
I understand that you want to use the recording in PowerPoint to record in your PC. You've done multiple troubleshooting steps to resolve you issue. However, since camera is working fine. I would suggest in doing a Manual uninstall of your Microsoft 365. This would delete the office in your device by deleting the folders and subfolders. If you are confident in your technical skills, I would suggest it.
Here is the link for the step-by-step guide on how to Manual uninstall your Office: Manually uninstall Office - Microsoft Support
Note: Before you start, you need to know removing Office manually is a long, complex process and might require that you reinstall the operating system if certain steps are done incorrectly.
Regards,
Michael Jr.
Microsoft Moderator