I'm not a Linux user myself. I have no experience with it. But there have been a number
of threads in here dealing with it. You could try searching this group using the keyword
"linux" or "ubuntu" & see what turns up. You could also take a look at this thread:
https://groups.google.com/g/video-downloadhelper-q-and-a/c/BzPLK2YyL-s
Do a string search in there for "linux" which will give you a few hits that will point
you off to threads that may be useful. Michel develops VDH on Linux so I'm pretty sure
there's a way for you to make it work in your case.