Bulk Video Joiner is a Gui based Video Joiner, which allows you to process entire directory trees containing Videos (mpg). This alleviates having to select files to join, when you have hundreds or thousands of folders containing videos. It processes as fast as the file can be copied, as it does not re-encode the files. This process seems to work on about 9 out of 10 split videos found on the net. It will fail on videos which have different sample rates.
The application allows you to select a source directory and a destination directory. It will join the videos one at a time in each directory, and it will open the video for you to review it. You will be prompted asking it it was successful or not, in which case you are given the option to delete the source files. It it fails to join correctly it will copy the directory containing the videos to the destination folder and delete the failed joined file. Destination filenames for the successful joins and failed joins are the folder name plus a random number.