Downloads and copies YouTube video transcripts.
Per
// ==UserScript==
// @name YouTube Transcript Downloader
// @namespace https://github.com/blarer/youtube-transcript-downloader
// @version 1.0
// @description Downloads and copies YouTube video transcripts.
// @author Blareware aka blare
// @match https://www.youtube.com/watch?v=*
// @grant GM_addStyle
// @run-at document-end
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// Add styles using GM_addStyle
GM_addStyle(`
#download_btn {
color: var(--yt-spec-text-primary);
background: var(--yt-spec-brand-button-background);
border: none;
border-radius: 18px;
padding: 8px 16px;
font-size: 14px;
cursor: pointer;
margin: 10px 0;
transition: opacity 0.2s;
}
#download_btn:hover {
opacity: 0.8;
}
`);
function init() {
// Updated selectors for 2023 YouTube structure
const possibleSelectors = [
"ytd-watch-metadata",
"#above-the-fold",
"#title.ytd-watch-metadata",
"#container.ytd-watch-metadata",
"ytd-video-primary-info-renderer"
];
console.log('Searching for YouTube containers...');
let container = null;
for (const selector of possibleSelectors) {
container = document.querySelector(selector);
if (container) {
console.log('Found container using selector:', selector);
break;
}
}
if (!container) {
console.log('Container not found, retrying...');
setTimeout(init, 1000);
return;
}
// Add event listener to the transcript button
const transcriptButton = document.querySelector('button[aria-label="Show transcript"]');
if (transcriptButton) {
transcriptButton.addEventListener('click', handleTranscriptButtonClick);
} else {
console.error('Transcript button not found.');
}
}
async function handleTranscriptButtonClick() {
// Check if button already exists
if (document.getElementById('download_btn')) {
console.log('Download button already exists');
return;
}
console.log('Creating download button...');
// Wait for the transcript container to load (up to 5 seconds)
const maxWaitTime = 5000;
const startTime = Date.now();
let transcriptContainer = null;
while (Date.now() - startTime < maxWaitTime) {
transcriptContainer = document.querySelector('div#segments-container');
if (transcriptContainer) {
break; // Transcript container found, exit loop
}
// Wait 200ms before retrying
await new Promise(resolve => setTimeout(resolve, 200));
}
if (!transcriptContainer) {
console.error('Transcript container not found.');
return;
}
// Create the download button
const downloadBtn = document.createElement('button');
downloadBtn.id = 'download_btn';
downloadBtn.textContent = 'Download Transcript';
downloadBtn.addEventListener('click', handleDownload);
// Create a wrapper div for the button
const wrapper = document.createElement('div');
wrapper.style.display = 'flex';
wrapper.style.justifyContent = 'flex-start'; // Align to the start
wrapper.style.alignItems = 'center';
wrapper.style.marginTop = '10px';
wrapper.appendChild(downloadBtn);
// Insert the button into the transcript container
transcriptContainer.insertAdjacentElement('afterbegin', wrapper);
console.log('Button successfully added to page');
}
async function handleDownload() {
try {
// Wait for the transcript to load (up to 5 seconds)
const maxWaitTime = 5000;
const startTime = Date.now();
let transcriptElements = [];
while (Date.now() - startTime < maxWaitTime) {
transcriptElements = Array.from(document.querySelectorAll('div#segments-container ytd-transcript-segment-renderer div.segment'))
.filter(el => el.textContent.trim() !== '');
if (transcriptElements.length > 0) {
break; // Transcript found, exit loop
}
await new Promise(resolve => setTimeout(resolve, 200)); // Wait 200ms before retrying
}
if (!transcriptElements.length) {
alert('No transcript found. Please open the transcript panel first.');
return;
}
const text = transcriptElements.map(el => el.textContent.trim()).join('\n');
const filename = `${document.title.replace(/[/\\?%*:|"<>]/g, '-')} - Transcript.txt`;
// Save to file
download(text, filename, "text/plain");
// Copy to clipboard
await navigator.clipboard.writeText(text);
console.log('Successfully copied transcript to clipboard');
} catch (err) {
console.error('Failed to process transcript:', err);
}
}
function download(data, filename, type) {
try {
const blob = new Blob([data], {type: type});
const url = URL.createObjectURL(blob);
const link = document.createElement("a");
link.href = url;
link.download = filename;
document.body.appendChild(link);
link.click();
requestAnimationFrame(() => {
URL.revokeObjectURL(url);
document.body.removeChild(link);
});
} catch (err) {
console.error('Failed to download file:', err);
}
}
// Start the initialization when page loads
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', init);
} else {
init();
}
})();