Enable DVD Playback
Install the required software library to play commercial DVDs in Zorin OS.
Most commercial DVDs are encrypted with CSS (the Content Scramble System), which attempts to restrict the software that can play a DVD. You can enable the playback of commercial DVDs in Zorin OS by installing a third-party software library called libdvdcss.
Warning
The use of the libdvdcss library may not be permitted in several countries, such as the United States due to the DMCA law (Digital Millennium Copyright Act). If you are unsure about the legality of using this library in your country, please consult your lawyer.
To install libdvdcss, please open the Terminal (Zorin Menu → Utilities → Terminal), enter the two commands listed below, and follow the on-screen instructions:
sudo apt install libdvd-pkg
sudo dpkg-reconfigure libdvd-pkg
Afterward, you should be able to play DVDs using the default Videos app in Zorin OS.