Hello,
When you put the DVD disc into the DVD drive, can you see the icon of the DVD drive on the "This Computer" page?
Normally, you can double-click on the page of "This Computer" to open the DVD to automatically play its contents, or right-click to open the DVD directory and enter its folder to view the contents (some DVDs support segmented playback).
Windows 10 comes with "Movies & TV" to be able to play DVD movies. I hope you can give these a try and let me know the results.
If you see any errors, such as an error message or a file that cannot be played, please provide a screenshot of the problem so I can confirm the problem.
Thank you for your patience and understanding!
Sincerely,
Manson | Microsoft Community Support Specialist