If you produce media, film, and animation as part of your business as I do you’ll probably run into a problem as when you encode to DVD format as you’ll need to test out your disk and Linux doesn’t automatically read DVD movies correctly.
The software VLC works for playing DVDs (which you can get through the Ubuntu Software Center in the dash). The correct way to open a disk in VLC is to open the program first and then use the file menu optoin “open disk” but you have to have a decoder installed.
The install command for the decoder is “sudo apt-get install libdvd-pkg”
If you get an error that say “libdvd-pkg: dpkg database is locked. You may need to use command “sudo dpkg-reconfigure libdvd-pkg” then just do a “sudo dpkg-reconfigure libdvd-pkg” and you should be good to go and VLC should play your DVD just fine.
There are more tips at https://help.ubuntu.com/community/RestrictedFormats/PlayingDVDs