Unfortunately at this moment Native Application is only available for Windows systems, versions for Linux and Mac OS X are under development.
Linux and Mac OS X users can use current AVD 3.0 without Native Application for downloading only single file video via browser or install old AVD version in Firefox 56 and below from Mozilla website here: https://addons.mozilla.org/en-US/firefox/addon/video-downloader-player/versions/
In case of problems with video detection please contact to our support at: https://support.ant.com/hc/en-us/requests/new