for the larger sized files, it sucks that you have to carefully designate the partial files as .001 .002 and .003 when you initially download it so that they can be extracted as one mp4 file when you're combining them after the individual parts have been downloaded. The part files cannot simply be downloaded as a regular standalone mp4 file if you want to download them as parts of a larger file and play them normally.
  

hope that makes sense and helps people having problems making anything other than the smaller mb files work for them.