Rated 5 out of 5 stars

As you requested here's the videos I tried to download.
http://www.youtube.com/watch?v=5AhGj4oisfU
http://www.youtube.com/watch?v=Q9veCjE_LgA
^These are the ones that did not mux

http://www.youtube.com/watch?v=0vKM1hL0yDQ
^this is the one that did

I needed these for a video I'm working on

Hope this helps in the troubleshooting process

This review is for a previous version of the add-on (5.0.7.1-signed).  This user has a previous review of this add-on.

Thanks for that information. We tested all three links and all 3 muxed successfully (downloaded simultaneously). When the 2nd file is finished downloading, muxing will take several minutes to begin. This is where you may feel it has failed but it has not. Remember, the files you are downloading are huge, 3hrs, 5hrs and 8hrs long!!! It takes some time but all 3 files will complete.

If you still need help, please contact us at the support email, thanks for your review.