Page 19 of the manual (http://download.cyberlink.com/ftpdload/user_guide/powerdvd/9/PowerDVD_UG_ENU.pdf)
gives instructions for playing back files from your hard drive.
Option 1: drag & drop a file directly onto the CyberLink PowerDVD user interface.
Option 2: click hard disk icon on the user interface, select Open movie file on hard disk drive and then browse to the folder that contains your
media. Click OK to begin playback.
Option 3: right click on a media file and select Open With. Select PowerDVD from the available list of programs.