🎧 YouTube Elo Tournament

1) Load songs

Paste YouTube URLs or IDs (one per line).

or: Load from playlist (YouTube API)

Requires a YouTube Data API key.

2) Run Elo tournament

Stage system: 450→225→112→56→20→8→final.
Each stage: 6 matchesPlayed (3 group appearances) before cutoff.
Groups of 3–4 normally; groups of 3 when ≤20 alive; 1v1 final when ≤8.
Elo: K decays from 32→6 as matches accumulate.
RD (uncertainty): starts at ±150, shrinks faster vs similar opponents.
Matchmaking: 70% Elo-close · 15% high-RD · 15% random.

No songs loaded.

3) Import / Export CSV

CSV columns: rank, id, title, url, elo, rd, matchesPlayed, eliminated

4) Bar chart race CSV

Columns: name · channel · thumbnail · match_0 · match_1 · …
Blank cells = song didn't play that match. Updated live in memory.

5) Cloud sync

Only used if this site is deployed with the included Cloudflare Pages Function + KV namespace (see README). Otherwise data just stays in this browser's local storage, same as before.

6) Edit data

Directly edit song titles, channels, Elo, RD, matches played, or eliminated status — no CSV round-trip needed.

Current stage number (used to figure out the next cutoff's MP threshold). Only change this if you're correcting old/imported data.

One-off repair: finds songs that are marked alive but sit at or below the highest eliminated song's Elo (i.e. escaped the prelim cutoff). Shows you the list before changing anything.

Current match

No tournament in progress.

Rankings

Sorted by Elo. RD bar shows uncertainty (green=confident, yellow=moderate, orange=uncertain).