The easiest thing would to just grab and install VLC player:
images.videolan.org
It's open source, free and generally one of the most popular players. I know for certain that it can open a disc to support DVD playback with menu support.
If you prefer a paid player, by all means purchase a current license of Cyberlink. I'm sure they'll be happy to take your money too

It's a fairly well-known name in that segment of the software business. It'll probably come with a lot of extra bloat and other apps though which you may or may not have use for.