While downloading QuickTime fixes playback issues, there are critical factors to consider: Download QuickTime 7.7.9 for Windows - Apple Support
If you encounter an error stating "QuickTime not available" or "PowerPoint cannot insert a video," follow these steps: quicktime powerpoint 2010 download
Note : If 7.7.9 does not install on newer systems like Windows 10, users have successfully used QuickTime 7.7.6 as a fallback. While downloading QuickTime fixes playback issues, there are
: Close and restart PowerPoint 2010 to allow it to recognize the new codecs. While downloading QuickTime fixes playback issues