// ==UserScript== // @name YouTube Video Data Downloader Toolkit // @namespace tweeks.io // @author Tweeks // @version 1.0.0 // @description Adds YouTube watch-page buttons to download captions/transcript, video info, comments, chat replay, jump to Up Next, and auto-like after dislike if over 50% watched. // @match https://www.youtube.com/watch* // @match https://youtube.com/watch* // @grant GM_download // @grant GM_registerMenuCommand // @grant TW_notifications // @run-at document-idle // ==/UserScript== (function () { 'use strict'; const BTN_ID = 'yt-data-toolkit-panel'; const YT_API = 'https://www.youtube.com/youtubei/v1/'; let lastVideoId = null; let dislikeHookedFor = null; const sleep = ms => new Promise(r => setTimeout(r, ms)); const toast = async (msg, type = 'info') => { try { if (typeof TW_toast === 'function') await TW_toast(msg, type, 'YouTube Toolkit', 3500); } catch (_) { console.log('[YouTube Toolkit]', msg); } }; function videoId() { return new URL(location.href).searchParams.get('v') || document.querySelector('ytd-watch-flexy')?.getAttribute('video-id') || ''; } function getPlayerResponse() { return window.ytInitialPlayerResponse || window.ytcfg?.data_?.PLAYER_VARS?.embedded_player_response && JSON.parse(window.ytcfg.data_.PLAYER_VARS.embedded_player_response); } function getInitialData() { return window.ytInitialData || window.ytcfg?.data_?.PAGE_BUILD_LABEL && window.ytInitialData; } function apiKey() { return window.ytcfg?.get?.('INNERTUBE_API_KEY') || window.yt?.config_?.INNERTUBE_API_KEY || ''; } function clientContext() { const ytcfg = window.ytcfg; return ytcfg?.get?.('INNERTUBE_CONTEXT') || { client: { clientName: 'WEB', clientVersion: ytcfg?.get?.('INNERTUBE_CLIENT_VERSION') || '2.20240726.00.00' } }; } async function youtubei(endpoint, body) { const key = apiKey(); if (!key) throw new Error('Could not find YouTube API key on this page.'); const res = await fetch(`${YT_API}${endpoint}?key=${encodeURIComponent(key)}`, { method: 'POST', credentials: 'same-origin', headers: { 'content-type': 'application/json' }, body: JSON.stringify({ context: clientContext(), ...body }) }); if (!res.ok) throw new Error(`${endpoint} failed: ${res.status}`); return res.json(); } function sanitize(name) { return (name || 'youtube-video').replace(/[\\/:*?"<>|]+/g, '_').slice(0, 120); } function title() { return getPlayerResponse()?.videoDetails?.title || document.querySelector('h1 yt-formatted-string, h1')?.textContent?.trim() || videoId(); } function downloadText(filename, text, mime = 'text/plain') { const blob = new Blob([text], { type: mime + ';charset=utf-8' }); const url = URL.createObjectURL(blob); if (typeof GM_download === 'function') GM_download({ url, name: filename, saveAs: true, onload: () => URL.revokeObjectURL(url), onerror: () => URL.revokeObjectURL(url) }); else { const a = Object.assign(document.createElement('a'), { href: url, download: filename }); a.click(); setTimeout(() => URL.revokeObjectURL(url), 5000); } } const textRuns = o => o?.runs?.map(r => r.text).join('') || o?.simpleText || ''; function findDeep(root, pred, out = [], limit = 50) { if (!root || out.length >= limit) return out; if (pred(root)) out.push(root); if (typeof root === 'object') for (const v of Object.values(root)) { if (v && typeof v === 'object') findDeep(v, pred, out, limit); } return out; } async function downloadCaptions() { const pr = getPlayerResponse(); const tracks = pr?.captions?.playerCaptionsTracklistRenderer?.captionTracks || []; if (!tracks.length) return toast('No caption tracks found for this video.', 'warning'); const track = tracks.find(t => /en/i.test(t.languageCode || t.name?.simpleText || '')) || tracks[0]; const res = await fetch(track.baseUrl + '&fmt=vtt', { credentials: 'include' }); downloadText(`${sanitize(title())}-captions.vtt`, await res.text(), 'text/vtt'); } async function downloadInfo() { const pr = getPlayerResponse() || {}; const vd = pr.videoDetails || {}; const meta = document.querySelector('ytd-watch-metadata')?.innerText?.trim() || ''; const info = { url: location.href, videoId: videoId(), title: vd.title || title(), author: vd.author, channelId: vd.channelId, lengthSeconds: vd.lengthSeconds, viewCount: vd.viewCount, keywords: vd.keywords, shortDescription: vd.shortDescription, pageMetadataText: meta, playerResponse: pr }; downloadText(`${sanitize(title())}-info.json`, JSON.stringify(info, null, 2), 'application/json'); } async function getContinuationItems(continuation, maxPages = 8) { const collected = []; for (let i = 0; continuation && i < maxPages; i++) { const data = await youtubei('next', { continuation }); const items = findDeep(data, x => x.commentThreadRenderer || x.liveChatTextMessageRenderer || x.liveChatPaidMessageRenderer, [], 500); collected.push(...items); const next = findDeep(data, x => x.continuationCommand?.token || x.timedContinuationData?.continuation || x.invalidationContinuationData?.continuation, [], 10)[0]; continuation = next?.continuationCommand?.token || next?.timedContinuationData?.continuation || next?.invalidationContinuationData?.continuation || ''; await sleep(250); } return collected; } async function downloadComments() { const init = getInitialData(); const node = findDeep(init, x => x.continuationCommand?.token && JSON.stringify(x).includes('comment'), [], 20)[0] || findDeep(init, x => x.continuationCommand?.token, [], 20)[0]; const token = node?.continuationCommand?.token; if (!token) return toast('Could not find a comments continuation. Try after the page finishes loading.', 'warning'); const raw = await getContinuationItems(token, 12); const comments = raw.map(x => x.commentThreadRenderer?.comment?.commentRenderer).filter(Boolean).map(c => ({ author: textRuns(c.authorText), text: textRuns(c.contentText), published: textRuns(c.publishedTimeText), likes: textRuns(c.voteCount), commentId: c.commentId })); downloadText(`${sanitize(title())}-comments.json`, JSON.stringify(comments, null, 2), 'application/json'); } async function downloadChatReplay() { const init = getInitialData(); const tokenNode = findDeep(init, x => x.reloadContinuationData?.continuation || x.timedContinuationData?.continuation || x.continuationCommand?.token, [], 30).find(x => JSON.stringify(x).includes('live_chat')); let token = tokenNode?.reloadContinuationData?.continuation || tokenNode?.timedContinuationData?.continuation || tokenNode?.continuationCommand?.token; if (!token) return toast('No chat replay continuation found for this video.', 'warning'); const raw = await getContinuationItems(token, 20); const messages = raw.map(x => x.liveChatTextMessageRenderer || x.liveChatPaidMessageRenderer).filter(Boolean).map(m => ({ author: textRuns(m.authorName), message: textRuns(m.message), timestamp: textRuns(m.timestampText), id: m.id })); downloadText(`${sanitize(title())}-chat-replay.json`, JSON.stringify(messages, null, 2), 'application/json'); } function goUpNext() { const link = document.querySelector('#secondary a[href*="/watch"], ytd-watch-next-secondary-results-renderer a[href*="/watch"], ytd-compact-video-renderer a[href*="/watch"]'); if (link?.href) location.href = link.href; else toast('No Up Next video link found.', 'warning'); } function addPanel() { if (document.getElementById(BTN_ID) || !document.querySelector('ytd-watch-flexy')) return; const panel = document.createElement('div'); panel.id = BTN_ID; panel.innerHTML = ``; document.body.appendChild(panel); panel.addEventListener('click', async e => { const act = e.target?.dataset?.act; if (!act) return; try { if (act === 'cap') await downloadCaptions(); if (act === 'info') await downloadInfo(); if (act === 'chat') await downloadChatReplay(); if (act === 'comments') await downloadComments(); if (act === 'next') goUpNext(); } catch (err) { console.error(err); toast(err.message || String(err), 'error'); } }); } function injectStyle() { if (document.getElementById('yt-data-toolkit-style')) return; const st = document.createElement('style'); st.id = 'yt-data-toolkit-style'; st.textContent = `#${BTN_ID}{position:fixed;right:16px;top:92px;z-index:2000;display:flex;flex-direction:column;gap:6px;background:#0f0f0fdd;border:1px solid #555;border-radius:10px;padding:8px;box-shadow:0 4px 16px #0008}#${BTN_ID} button{font:12px Arial,sans-serif;border:0;border-radius:16px;padding:7px 10px;background:#fff;color:#0f0f0f;cursor:pointer}#${BTN_ID} button:hover{background:#3ea6ff;color:#000}`; document.head.appendChild(st); } function hookDislike() { const id = videoId(); if (!id || dislikeHookedFor === id) return; dislikeHookedFor = id; document.addEventListener('click', e => { const btn = e.target.closest('button, ytd-toggle-button-renderer, yt-button-shape'); if (!btn) return; const label = (btn.getAttribute('aria-label') || btn.textContent || '').toLowerCase(); if (!label.includes('dislike')) return; const v = document.querySelector('video'); if (v && v.duration && v.currentTime / v.duration > 0.5) setTimeout(() => { const like = [...document.querySelectorAll('button[aria-label], ytd-toggle-button-renderer, yt-button-shape')].find(b => /like/.test((b.getAttribute('aria-label') || '').toLowerCase()) && !/dislike/.test((b.getAttribute('aria-label') || '').toLowerCase())); like?.click(); toast('Auto-liked because more than 50% was watched after dislike click.', 'success'); }, 600); }, true); } function tick() { const id = videoId(); if (id !== lastVideoId) { lastVideoId = id; setTimeout(addPanel, 1500); hookDislike(); } addPanel(); } GM_registerMenuCommand('Download captions', downloadCaptions); GM_registerMenuCommand('Download video info', downloadInfo); GM_registerMenuCommand('Download comments', downloadComments); GM_registerMenuCommand('Download chat replay', downloadChatReplay); GM_registerMenuCommand('Play Up Next', goUpNext); injectStyle(); tick(); setInterval(tick, 2000); })();