PlanarAlly is a pretty cool self-hosted VTT.
Requires some setting up, but zspotify can download entire playlists.
Don’t know if this will achieve what you want, but I selfhost ChangeDetection.io to check if webpages have been updated, then subscribe to changedetection’s RSS feed with FreshRSS.
You’re probably right, but it’s an alternative for people who don’t.