I want to add this command into a launcher on the panel or desktop so that I can start the inserted DVD with a single click.I would prefer this to selecting one of the many options my KDE panel notifier offers, or to opening VLC, going to Media - Open disc etc. (On the other hand I prefer not to enable the option of playing automatically any inserted DVD.)
CLI command to start playing inserted DVD in VLC?
command line;vlc;dvd;mediaplayer
GAD3R gave the answer in a comment to the question: vlc dvd://