Your data and our methodology
What this site keeps in your browser, how to take it with you or delete it, and how the catalog itself is maintained.
Data stored in your browser
Likes, dislikes, saved playlists, Watch later, history and display settings are saved in your browser’s local storage under the key nq.local.v1. They never leave your device unless you export them, they are not linked to an account, and they are not synced to your other devices or browsers. Clearing your browser’s site data also removes them.
When you open Liked, Watch later or History, your browser asks this site for the public catalog details of those entries so it can show titles and thumbnails. That request is not stored or linked to you.
Stored in this browser: Reading this browser’s storage…
How the catalog is built
- Editors identify candidate recordings from reliable sources and clearly attributable YouTube channels.
- Candidate videos are checked through YouTube’s official Data API — never by scraping YouTube pages.
- Each entry is reviewed for performer identity, sources, provenance tier, context, duplicates, rights language, availability and accessibility.
- Editors write original summaries and explain why each entry is included. YouTube descriptions, lyrics and liner notes are not copied.
- Only reviewed entries are published.
This is a curated and continuously expanding catalog. It is not a complete list of every video available on YouTube.
Keeping YouTube data fresh
The few details shown from YouTube — the video’s title on YouTube, channel name, duration, upload date and thumbnail — are stored for at most 30 days, as YouTube’s developer policies require. They are refreshed regularly, and deleted if they cannot be refreshed. Videos that become deleted, private or blocked from embedding are removed from listings and are never presented as playable. View counts, likes and other YouTube statistics are not collected or shown.
Editorial content — summaries, inclusion notes, provenance and rights labels, playlists — is written by this site and is always labelled separately from data that comes from YouTube.