Possible Duplicate:
How I can extract files, name.iso.001 name.iso002 and so on
Files spitted like that should be joined but they are not just fragments of video, but behave like archives. How to join them into one and restore the original form of the video?
cat
doesn't work for you try following the steps outlined here (doesn't require transcoding): askubuntu.com/a/187679/81372