alt Hacker NewsEDIT: Sorry I realised you were asking more about categorisation and not downloading.
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The closest thing I can think of is Tube Archivist, which seems made for archiving large YouTube collections, including things like comments on videos.
I’ve had mixed luck with it and it’s a bit too heavy for my fairly limited needs. Youtube-dl hasn’t worked for me for the last month or so on it —- oddly enough I have a MeTube instance on the same physical machine (different VM) which is a lighter web UI for yt-dlp and which is still working fine. That’s Youtube’s fault I assume and not the fault of Tube Archivist.