Some DVD Players won't play the disc automatically but will show 'PCB' on their display. In this case just pressing the play button won't work. On Panasonic DVD players I discovered that you must press STOP, then the display will show number of video clips and total time recorded on disc
Next, press 'PREVIOUS SEGMENT OR CLIP' and the display will start flashing the number of clips recorded. If you've recorded only one clip press 'PLAY'. Otherwise press "PREVIOUS' until the clip number you want to watch appears
May I suggest purchasing one of the cheap DVD players, DAYTEK, for example, for around $50.00 they play almost everything, it's frustrating that the more expensive can't match them for features.