First time I'd seen Octarine in one of these — that block-based take sits somewhere between Workflowy and Logseq from a quick look.

Adjacent thing I built that might fit a future round-up: Klipptik. Where note-apps treat a YouTube video as a link, this is the same library shape but the video is the entry — clips on the timeline, all of it tagged and searchable. Founder disclosure; happy to send a founder account if a slot ever fits.