You can use it about a 1000 times thats true, but the quality will suffer near the end of those 1000. You can indeed get 6 hours of video on one disc but again you have to reduce the recording speed and the quality suffers, Aim for about 2 hours tops on to one disc and the quality will be fine.
thanks tellyboy the dvd is for recording tv programmes to watch in the lorry when I'm away. I get 6hrs long play as machine can record upto 6hrs. but when I went to clear the dvd it came up failed and then it comes up file when I try to playback