I do not understand this.

If you have an older version of Powerpoint, it may be that you cannot run powerpoint files that have been created by somebody using a newer version of the program. To fix this problem, you may need to update your older version of powerpoint so that you can play the file. These updates are often codec packs.

This site might be helpful if your powerpoint can't run a video or sound file:

https://support.office.com/en-us/article/video-and-audio-file-formats-supported-in-powerpoint-d8b12450-26db-4c7b-a5c1-593d3418fb59