[UriF]

"What advantages does their "paid version" have?"
Paid version include converter. For example you have a stream with .ts files. You have to join then and convert into .mp4. Therefore to download this file you have download all of .mp4 segments and join them. To tell you the true I don't to pay them because I want to download these 4 parts and use Avidemux to join them. Fortunately, I found a 480p resolution of this video at the other web site.

"Using that addon was not any kind of advertisement by us - just an information so please do not pay it because of our "advise""
Yes, I understand. You recommend to use VDH just for link extraction only.

They use a Fluid Player v.3 for video play. I tried all of search engines and I found out a very old article from 2010 which recommend MS IE add-on or Ant Downloader. Please be advised that these recommendations for a Fluid Player v.2. As you can see Ant Downloader is not able to get this video and MS IE is obsolete