The discs should play in most stand alone DVD players but you may have to 'finalise' them in your camcorder first, - have you tried playing them on your PC - you will need some software which simulates a DVD player on your PC - you may have 'Power DVD' which is supplied free on some PCs.
You can also import it to your computer in different ways and edit it, one programme you could use is Ulead VideoStudio you can get a free one month trial from here :-
http://www.ulead.co.uk/vs/trial.htm
you just put the DVD in your PC DVD tray and use 'import DVD' in the programme to transfer your video for editing and burning to a full size DVD - but again you may have to 'finalise' the DVD in your camcorder for it to work.