@pimoore You can subscribe to YT channels, but if it has not posted in a while it will offer no content in the feed. That while might amount to more than six months or three, uncertain. I say this regarding NNW on macOS. Caveat: I get the channel ID and add it to this URL chunk: https:\/\/www.youtube.com/feeds/videos.xml?channel_id=
... which you probably refer to as Manually Intervene with URL above.
To get a channel_id, right-click on the channel avatar offered in each video and copy URL, the end string starting with "UC".