If I correctly understood your request I don’t think the issue is in the RSS integration.
I believe the problem here is that the RSS feed links to a video, which is not downloadable by the software I know for Usenet or Torrent (NZBGet, Sabnzbd, rTorrent, Transmission or Deluge).
You’d need another downloader (e.g. youtube-dl) to actually get the video and limit it to YouTube releases only.
Yes this is true, I wonder if it couldn’t have jdownloader2 or youtub-dl added as a downloader option. I know I’m not a developer so I don’t know how much work that would entail. I’m just hoping