Hi -- I seem to be having a similar problem.
I participated in a web series called BECKINFIELD. I recently learned that the site may shut down soon. My computer, which previously had all my videos, crashed a while back. So this is my last chance to retrieve any of those files.
The site's administrators have never figured out how to let users download videos. And since the videos were not hosted on YouTube, Vimeo, etc., but on the specific site, normal downloaders like Keepvid don't work for me.
I downloaded Jaksta at a friend's suggestion. It downloads part of each video, but then stops about one to two minutes before the end of each video.
It also makes two copies of each video (that is, two files with the same name), but only one of them plays properly.
I have tried multiple videos with the same result.
A Google search about my problem led me to this forum.
Here is the site with our videos:
http://theatrics.com/beckinfield
Can someone please help? Thanks in advance!