DVD-R. I have several DVD-R's that contain video drom my camcorder. I've tried several programs

Question

I have several DVD-R's that contain video drom my camcorder. I've tried several programs to open them-each time I'm told they are blank. Not sure if this has anything to do with it but I flew last weekend and checked the bag containing the disks(is there any chance the machines my luggage went through would have erased the info on the DVD's?) Is there any place that I can take my discs to get the videos recovered? I'm sorry to sound so ignorant-and thank you for the help.