Yes, there’s a Jellyfin add-on that uses the API to index them as its own Jellyfin library.
Each channel is a show, each year is a season and every video/short/stream is an episode. It pulls the rich metadata from YouTube as well, so you get thumbnails, descriptions, etc.
I have stopped using Smarttube Next in favour of this.
Only downside is YouTube are great at throttling people doing this so I had to set my download speed to 750kbps to avoid throttling.