Hotmart has been reported on here regularly as a problem site. You should have done a
search in this group on the search keyword Hotmart before you posted.
In any case, you should take a look over here:
https://groups.google.com/g/video-downloadhelper-q-and-a/c/BzPLK2YyL-s
Look for the reference to an alternative technique to try when VDH fails to download
something. Click through to that & read what's there. My suspcion has been for a while
now that Hotmart uses DASH streaming. But I am not a member of Hotmart so I can't verify
this for myself. I have been hoping somebody who is a member of Hotmart will try the
alternative technique & report back some results. Will you be that first person? I am
hoping so.
In addition, the Table of Contents thread contains a specific reference to Hotmart. Read
that & decide if you'd rather do that. I'm hoping instead you try the alternative
technique.