XDM will detect the stream automatically. Alternatively, you can click "Add to Chrome" to activate the extension to start the download.
Finally, before you go through the technical steps above, it's always worth checking if the platform itself has made things easier. According to its official update logs, XtremeStream announced a new native "Download Feature". This feature may have been further developed or rolled out more broadly since its announcement, so always look for a "Download" button on the video page first—it might be the simplest solution of all. how to download xtremestream video full