I am not much with 8mm cassette either.
Can you play these on a vcr or movie camera? I probably would get a dvd recorder and record everything in dvd discs and later you can put them in your computer and edit them. There are many capable software program that can do this. Of course there are devices that can capture the video directly to the computer harddrive as well but it has been my experience that recording to a dvd record is the best way to do it..in my opinion.