Local Youtube Downloader Tampermonkey Apr 2026

try []; const allFormats = [...formats, ...adaptiveFormats];

// Wait for page to load setTimeout(addDownloadButtons, 3000);

function downloadStream(url, filename) // Use GM_download if available (Tampermonkey) if (typeof GM_download !== 'undefined') GM_download( url: url, name: filename, saveAs: true ); else // Fallback: create an anchor and click const a = document.createElement('a'); a.href = url; a.download = filename; document.body.appendChild(a); a.click(); document.body.removeChild(a); local youtube downloader tampermonkey

if (!selectedStream catch (err) console.error(err); alert("Failed to fetch video info. YouTube API may have changed.");

// Video button const videoBtn = createButton('📹 Download Video (MP4)', 'video'); // Audio button const audioBtn = createButton('🎵 Download Audio (MP3)', 'audio'); try []; const allFormats = [

// Button click handler videoBtn.onclick = () => fetchStreams(videoId, 'video', videoTitle); audioBtn.onclick = () => fetchStreams(videoId, 'audio', videoTitle);

function addDownloadButtons() ]/g, "");

async function fetchStreams(videoId, type, videoTitle) const apiUrl = `https://www.youtube.com/youtubei/v1/player?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8`; const data = videoId: videoId, context: client: clientName: "WEB", clientVersion: "2.20230101.00.00" ;

let selectedStream = null; if (type === 'video') // Best quality MP4 with both video+audio selectedStream = allFormats.find(f => f.mimeType.includes('video/mp4') && f.hasVideo && f.hasAudio); if (!selectedStream) // Fallback: video only + audio only merge not supported in simple script selectedStream = allFormats.find(f => f.mimeType.includes('video/mp4') && f.hasVideo); else // Best audio only (prefer audio/mp4 which can be renamed .m4a or .mp3) selectedStream = allFormats.find(f => f.mimeType.includes('audio/mp4') && f.audioChannels); if (!selectedStream) selectedStream = allFormats.find(f => f.mimeType.includes('audio/webm')); const allFormats = [...formats

container.appendChild(videoBtn); container.appendChild(audioBtn); menu.appendChild(container);