I have a Panasonic DVD/HDD recorder. I tried to transfer some of my old videos on to the Panasonic's hard drive, so that I could then edit them and transfer them onto DVD disc. The problem I found was that most of the videos that I had were originals and as such they had copy protection on them, the Panasonic unit picked up on this and displayed "Cannot copy, copy protection detected" or words to that affect.
If your video collection is not originals then its simply a matter of connecting your video recorder to you Panasonic HDD recorder. I will provide a link below, the link is basically along similar lines to your situation. Hope it helps.