Universal Video Downloader (X/Twitter Support + M3U8)

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Universal Video Downloader (X/Twitter Support + M3U8)

Universal video downloader with special X/Twitter support. Downloads M3U8, MP4, and intercepts network streams.
当前为 2025-12-17 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Universal Video Downloader (X/Twitter Support + M3U8)
// @namespace    http://tampermonkey.net/
// @version      7.0
// @description  Universal video downloader with special X/Twitter support. Downloads M3U8, MP4, and intercepts network streams.
// @author       Minoa
// @license      MIT
// @match        *://*/*
// @require      https://cdn.jsdelivr.net/npm/[email protected]/dist/m3u8-parser.min.js
// @require      https://cdn.jsdelivr.net/npm/@warren-bank/[email protected]/dist/umd/ffmpeg.js
// @resource     classWorkerURL  https://cdn.jsdelivr.net/npm/@warren-bank/[email protected]/dist/umd/258.ffmpeg.js
// @resource     coreURL         https://cdn.jsdelivr.net/npm/@ffmpeg/[email protected]/dist/umd/ffmpeg-core.js
// @resource     wasmURL         https://cdn.jsdelivr.net/npm/@ffmpeg/[email protected]/dist/umd/ffmpeg-core.wasm
// @grant        GM_addStyle
// @grant        GM_getResourceURL
// ==/UserScript==

(function() {
    'use strict';

    // --- Configuration & State ---
    var floatingButton = null;
    var pressTimer = null;
    var isLongPress = false;
    var checkInterval = null;
    var detectedM3U8s = [];
    var detectedM3U8Urls = [];
    var allDetectedVideos = new Map(); // Key: URL, Value: Object
    var downloadedBlobs = new Map();
    var debugMode = false;
    var debugConsole = null;
    var debugLogs = [];
    var longPressStartTime = 0;
    var ffmpegInstance = null;
    var ffmpegLoaded = false;
    var wasmBinaryCache = null;

    // Detect Platform
    const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
    const isMobile = isIOS || /Android|webOS|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent);
    const isTwitter = window.location.hostname.includes('twitter.com') || window.location.hostname.includes('x.com');

    // Color scheme
    const COLORS = {
        button: 'rgba(85, 66, 61, 0.7)',
        buttonHover: 'rgba(107, 86, 81, 0.85)',
        icon: '#ffc0ad',
        text: '#fff3ec',
        twitter: 'rgba(29, 161, 242, 1.0)'
    };

    // --- Styles ---
    GM_addStyle(`
        /* Universal Button Styles */
        #universal-video-share-container {
            position: fixed !important;
            top: 15px !important;
            left: 15px !important;
            width: 50px !important;
            height: 50px !important;
            z-index: 2147483647 !important;
            pointer-events: auto !important;
            isolation: isolate !important;
        }
        #universal-video-share-float {
            position: absolute !important;
            top: 2px !important;
            left: 2px !important;
            width: 46px !important;
            height: 46px !important;
            background: ${COLORS.button} !important;
            backdrop-filter: blur(12px) !important;
            -webkit-backdrop-filter: blur(12px) !important;
            color: ${COLORS.icon} !important;
            border: 2px solid rgba(255, 255, 255, 0.3) !important;
            border-radius: 50% !important;
            font-size: 18px !important;
            cursor: pointer !important;
            display: flex !important;
            align-items: center !important;
            justify-content: center !important;
            transition: all 0.2s ease !important;
            user-select: none !important;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4) !important;
            z-index: 2147483647 !important;
        }
        #universal-video-share-float:hover {
            background: ${COLORS.buttonHover} !important;
            transform: scale(1.1) !important;
        }
        #progress-circle { pointer-events: none !important; }
        .universal-video-notification { z-index: 2147483646 !important; }
        #video-selector-popup { z-index: 2147483645 !important; }
        #debug-console { z-index: 2147483644 !important; }

        /* Twitter Specific Styles */
        .tmd-down {
            margin-left: 2px !important;
            order: 99;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 34.75px;
            height: 34.75px;
            border-radius: 9999px;
            transition: background-color 0.2s;
            cursor: pointer;
        }
        .tmd-down:hover { background-color: rgba(29, 161, 242, 0.1); }
        .tmd-down svg { color: rgb(113, 118, 123); width: 20px; height: 20px; }
        .tmd-down:hover svg { color: ${COLORS.twitter}; }
        .tmd-down.downloading svg { animation: spin 1s linear infinite; color: ${COLORS.twitter}; }
        @keyframes spin { 0% {transform: rotate(0deg);} 100% {transform: rotate(360deg);} }
    `);

    // Common video selectors
    var VIDEO_SELECTORS = [
        'video',
        '.video-player video',
        '.player video',
        '#player video',
        'iframe[src*="youtube.com"]',
        'iframe[src*="vimeo.com"]',
        'iframe[src*="dailymotion.com"]'
    ];

    var VIDEO_EXTENSIONS = ['.mp4', '.webm', '.ogg', '.mov', '.avi', '.wmv', '.flv', '.mkv', '.m4v', '.3gp'];

    // --- Helpers ---

    function sanitizeFilename(filename) {
        return filename.replace(/[<>:"\/\\|?*\x00-\x1F]/g, '').replace(/\s+/g, '_').substring(0, 100);
    }

    function getFilenameFromPageTitle(extension = 'mp4') {
        const pageTitle = document.title || 'video';
        return sanitizeFilename(pageTitle) + '.' + extension;
    }

    function isElementVisible(el) {
        if (!el) return false;
        const rect = el.getBoundingClientRect();
        return (
            rect.top >= 0 &&
            rect.left >= 0 &&
            rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) &&
            rect.right <= (window.innerWidth || document.documentElement.clientWidth) &&
            rect.width > 0 && rect.height > 0
        );
    }

    // --- FFmpeg Logic ---
    const getWasmBinary = async () => {
        if (wasmBinaryCache) return wasmBinaryCache.slice(0);
        const wasmURL = GM_getResourceURL('wasmURL', false);
        let wasmBinary = null;
        if (wasmURL.startsWith('data:')) {
            const base64 = wasmURL.substring(wasmURL.indexOf(',') + 1);
            const binaryString = atob(base64);
            const bytes = new Uint8Array(binaryString.length);
            for (let i = 0; i < binaryString.length; i++) bytes[i] = binaryString.charCodeAt(i);
            wasmBinary = bytes.buffer;
        } else if (wasmURL.startsWith('blob:')) {
            wasmBinary = await fetch(wasmURL).then(res => res.arrayBuffer());
        }
        if (wasmBinary) wasmBinaryCache = wasmBinary.slice(0);
        return wasmBinary;
    };

    async function initFFmpeg() {
        if (ffmpegLoaded && ffmpegInstance) return ffmpegInstance;
        debugLog('[FFMPEG] Initializing...');
        showNotification('⚙️ Loading FFmpeg...', 'info');
        try {
            ffmpegInstance = new window.FFmpegWASM.FFmpeg();
            ffmpegInstance.on('log', ({ message }) => debugLog('[FFMPEG LOG] ' + message));
            ffmpegInstance.on('progress', ({ progress }) => updateProgress(Math.round(progress * 100)));
            await ffmpegInstance.load({
                classWorkerURL: GM_getResourceURL('classWorkerURL', false),
                coreURL: GM_getResourceURL('coreURL', false),
                wasmBinary: await getWasmBinary()
            });
            ffmpegLoaded = true;
            showNotification('✅ FFmpeg loaded', 'success');
            return ffmpegInstance;
        } catch(e) {
            showNotification('❌ FFmpeg failed', 'error');
            throw e;
        }
    }

    async function convertTStoMP4(tsBlob, baseFilename) {
        try {
            const ffmpeg = await initFFmpeg();
            const inputName = 'input.ts';
            const outputName = baseFilename.endsWith('.mp4') ? baseFilename : baseFilename + '.mp4';
            
            await ffmpeg.writeFile(inputName, new Uint8Array(await tsBlob.arrayBuffer()));
            showNotification('🔄 Converting...', 'info');
            await ffmpeg.exec(['-i', inputName, '-c', 'copy', '-movflags', 'faststart', outputName]);
            
            const data = await ffmpeg.readFile(outputName, 'binary');
            await ffmpeg.deleteFile(inputName);
            await ffmpeg.deleteFile(outputName);
            
            return { blob: new Blob([data.buffer], { type: 'video/mp4' }), filename: outputName };
        } catch(e) {
            debugLog('[ERROR] Convert failed: ' + e.message);
            throw e;
        }
    }

    // --- Network Sniffing ---
    (function setupNetworkDetection() {
        const handleUrl = (url) => {
            if (!url) return;
            if (url.includes('.m3u8') || url.includes('.m3u')) detectM3U8(url);
            else if (url.match(/\.(mp4|webm|mov)(\?|$)/i)) checkUrlForVideo(url);
        };

        const originalFetch = window.fetch;
        window.fetch = function(...args) {
            const url = typeof args[0] === 'string' ? args[0] : args[0]?.url;
            handleUrl(url);
            return originalFetch.apply(this, args).then(res => {
                res.clone().text().then(t => { if(t.startsWith("#EXTM3U")) detectM3U8(url); }).catch(()=>{});
                return res;
            });
        };

        const originalOpen = XMLHttpRequest.prototype.open;
        XMLHttpRequest.prototype.open = function(...args) {
            this.addEventListener("load", () => {
                handleUrl(args[1]);
                if (this.responseText && this.responseText.trim().startsWith("#EXTM3U")) detectM3U8(args[1]);
            });
            return originalOpen.apply(this, args);
        };
    })();

    function checkUrlForVideo(url) {
        if (url.startsWith('blob:') || url.includes('.m3u8')) return;
        const fullUrl = new URL(url, location.href).href;
        if (!allDetectedVideos.has(fullUrl)) {
            allDetectedVideos.set(fullUrl, {
                url: fullUrl,
                type: 'video',
                timestamp: Date.now(),
                title: 'Video File',
                isOnScreen: false
            });
            checkForVideos();
        }
    }

    async function detectM3U8(url) {
        try {
            if (url.startsWith('blob:')) return;
            url = new URL(url, location.href).href;
            if (detectedM3U8Urls.includes(url)) return;
            
            detectedM3U8Urls.push(url);
            debugLog('[M3U8] Detected: ' + url);

            const response = await fetch(url);
            const content = await response.text();
            const parser = new m3u8Parser.Parser();
            parser.push(content);
            parser.end();

            if (parser.manifest.playlists && parser.manifest.playlists.length > 0) {
                // Master playlist - get best quality
                const best = parser.manifest.playlists.sort((a,b) => (b.attributes.BANDWIDTH || 0) - (a.attributes.BANDWIDTH || 0))[0];
                const nextUrl = new URL(best.uri, url).href;
                detectM3U8(nextUrl);
                return;
            }

            const m3u8Data = {
                url: url,
                manifest: parser.manifest,
                title: 'Stream ' + (detectedM3U8s.length + 1),
                timestamp: Date.now()
            };
            
            detectedM3U8s.push(m3u8Data);
            allDetectedVideos.set(url, {
                url: url,
                type: 'm3u8',
                timestamp: Date.now(),
                title: m3u8Data.title,
                m3u8Data: m3u8Data,
                isOnScreen: false
            });
            checkForVideos();
        } catch(e) { debugLog('[M3U8] Error: ' + e.message); }
    }

    // --- Video Gathering Logic ---
    function getUniqueVideos() {
        const videos = [];
        const seenUrls = new Set();

        // 1. Check DOM Elements (and determine visibility)
        const domVideos = [];
        document.querySelectorAll('video, iframe').forEach(el => {
            let src = el.currentSrc || el.src;
            // Try to find source tags
            if (!src && el.tagName === 'VIDEO') {
                const source = el.querySelector('source');
                if (source) src = source.src;
            }
            
            if (src) {
                const isBlob = src.startsWith('blob:');
                const isVisible = isElementVisible(el);
                
                domVideos.push({
                    element: el,
                    src: src,
                    isBlob: isBlob,
                    isVisible: isVisible
                });
            }
        });

        // 2. Map DOM elements to Network Requests
        allDetectedVideos.forEach((data, url) => {
            // Reset visibility
            data.isOnScreen = false;
            
            // Heuristic: If we found a DOM element with this URL, use its visibility
            const match = domVideos.find(v => v.src === url);
            if (match) {
                data.isOnScreen = match.isVisible;
            } 
            // Heuristic: If DOM has a blob URL, and we have an M3U8 that was detected around the same time
            else if (data.type === 'm3u8') {
                // Check if any visible blob video exists
                const visibleBlob = domVideos.find(v => v.isBlob && v.isVisible);
                if (visibleBlob) {
                    // Weak association: if we have a visible blob video and this m3u8 is recent, assume match
                    // This is imperfect but works for Twitter/YouTube often
                    if (Date.now() - data.timestamp < 30000) {
                        data.isOnScreen = true;
                    }
                }
            }

            if (!seenUrls.has(url)) {
                seenUrls.add(url);
                videos.push(data);
            }
        });

        // 3. Add DOM videos that weren't caught by network sniffing (e.g. direct MP4 src)
        domVideos.forEach(v => {
            if (!v.isBlob && !seenUrls.has(v.src)) {
                seenUrls.add(v.src);
                videos.push({
                    url: v.src,
                    type: 'video',
                    timestamp: Date.now(),
                    title: document.title,
                    isOnScreen: v.isVisible
                });
            }
        });

        // Sort: OnScreen first, then by time
        return videos.sort((a, b) => {
            if (a.isOnScreen && !b.isOnScreen) return -1;
            if (!a.isOnScreen && b.isOnScreen) return 1;
            return b.timestamp - a.timestamp;
        });
    }

    // --- UI: Floating Button ---
    function createFloatingButton() {
        if (floatingButton) return floatingButton;
        const container = document.createElement('div');
        container.id = 'universal-video-share-container';
        container.innerHTML = `
            <svg width="50" height="50" style="position:absolute;top:0;left:0;transform:rotate(-90deg);pointer-events:none;">
                <circle id="progress-circle" cx="25" cy="25" r="22" fill="none" stroke="#4ade80" stroke-width="3" stroke-dasharray="138" stroke-dashoffset="138" stroke-linecap="round" style="transition: stroke-dashoffset 0.3s ease;"></circle>
            </svg>
            <div id="universal-video-share-float">▶</div>
        `;
        
        floatingButton = container.querySelector('#universal-video-share-float');
        floatingButton.progressCircle = container.querySelector('#progress-circle');

        const handlePress = (e) => {
            e.preventDefault();
            isLongPress = false;
            longPressStartTime = Date.now();
            pressTimer = setTimeout(() => {
                isLongPress = true;
                floatingButton.innerHTML = '🐛';
                floatingButton.style.background = 'rgba(239, 68, 68, 0.8)';
                debugMode = true;
                debugLog('[DEBUG] Enabled');
            }, 3000);
        };

        const handleRelease = (e) => {
            e.preventDefault();
            clearTimeout(pressTimer);
            floatingButton.style.background = COLORS.button;
            
            if (Date.now() - longPressStartTime >= 3000) {
                createDebugConsole();
            } else if (!isLongPress) {
                handleShare();
            }
        };

        floatingButton.addEventListener('mousedown', handlePress);
        floatingButton.addEventListener('touchstart', handlePress);
        floatingButton.addEventListener('mouseup', handleRelease);
        floatingButton.addEventListener('touchend', handleRelease);

        document.body.appendChild(container);
        return floatingButton;
    }

    function updateProgress(percent) {
        if (floatingButton) floatingButton.progressCircle.setAttribute('stroke-dashoffset', 138 - (138 * percent / 100));
    }

    // --- UI: Video Selector ---
    function showVideoSelector(videos, action = 'download') {
        document.getElementById('video-selector-popup')?.remove();

        const popup = document.createElement('div');
        popup.id = 'video-selector-popup';
        popup.style.cssText = 'position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.7);backdrop-filter:blur(5px);display:flex;justify-content:center;align-items:center;padding:20px;';
        
        const content = document.createElement('div');
        content.style.cssText = 'background:#1a1a1a;border:1px solid #333;border-radius:12px;padding:20px;max-width:500px;width:100%;max-height:80vh;overflow-y:auto;color:#fff;';
        
        const header = document.createElement('div');
        header.innerHTML = `<h3 style="margin:0 0 15px;">Select Video (${videos.length})</h3>`;
        content.appendChild(header);

        // Group videos
        const onscreen = videos.filter(v => v.isOnScreen);
        const others = videos.filter(v => !v.isOnScreen);

        const createList = (list, label) => {
            if (list.length === 0) return;
            const title = document.createElement('div');
            title.textContent = label;
            title.style.cssText = 'font-size:12px;text-transform:uppercase;color:#888;margin:10px 0 5px;font-weight:bold;';
            content.appendChild(title);

            list.forEach(v => {
                const item = document.createElement('div');
                item.style.cssText = 'padding:12px;background:#2a2a2a;margin-bottom:8px;border-radius:6px;cursor:pointer;border:1px solid transparent;transition:0.2s;';
                item.onmouseover = () => item.style.borderColor = '#4ade80';
                item.onmouseout = () => item.style.borderColor = 'transparent';
                
                item.innerHTML = `
                    <div style="display:flex;justify-content:space-between;margin-bottom:4px;">
                        <span style="background:${v.type==='m3u8'?'#ef4444':'#3b82f6'};padding:2px 6px;border-radius:4px;font-size:10px;font-weight:bold;">${v.type.toUpperCase()}</span>
                        <span style="font-size:11px;color:#888;">${new Date(v.timestamp).toLocaleTimeString()}</span>
                    </div>
                    <div style="font-size:13px;word-break:break-all;">${v.title || 'Unknown Video'}</div>
                    <div style="font-size:10px;color:#666;margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">${v.url}</div>
                `;
                item.onclick = () => {
                    popup.remove();
                    processVideoAction(v);
                };
                content.appendChild(item);
            });
        };

        createList(onscreen, '👁️ On Screen Now');
        createList(others, '📚 Other Detected Videos');

        const closeBtn = document.createElement('button');
        closeBtn.textContent = 'Close';
        closeBtn.style.cssText = 'width:100%;padding:10px;margin-top:10px;background:#333;border:none;color:#fff;border-radius:6px;cursor:pointer;';
        closeBtn.onclick = () => popup.remove();
        content.appendChild(closeBtn);

        popup.appendChild(content);
        document.body.appendChild(popup);
    }

    function handleShare() {
        const videos = getUniqueVideos();
        if (videos.length === 0) return showNotification('❌ No videos found', 'error');
        
        // If multiple videos, OR if we are on Twitter (where context matters), show selector
        if (videos.length > 1 || isTwitter) {
            showVideoSelector(videos);
        } else {
            processVideoAction(videos[0]);
        }
    }

    function processVideoAction(videoData) {
        if (videoData.type === 'm3u8') {
            downloadM3U8(videoData);
        } else {
            shareOrDownloadBlob(null, getFilenameFromPageTitle('mp4'), videoData);
        }
    }

    // --- Download Logic ---
    async function downloadM3U8(videoData) {
        const cached = downloadedBlobs.get(videoData.url);
        if (cached) return shareOrDownloadBlob(cached.blob, cached.filename, videoData);

        updateProgress(0);
        showNotification('📥 Downloading Stream...', 'info');

        try {
            const manifest = videoData.m3u8Data.manifest;
            const baseUrl = videoData.url.substring(0, videoData.url.lastIndexOf('/') + 1);
            const segments = manifest.segments;

            if (!segments || !segments.length) throw new Error("No segments");

            const chunks = [];
            let total = 0;

            for (let i = 0; i < segments.length; i++) {
                const uri = segments[i].uri.startsWith('http') ? segments[i].uri : baseUrl + segments[i].uri;
                const res = await fetch(uri);
                const buff = await res.arrayBuffer();
                chunks.push(buff);
                total += buff.byteLength;
                updateProgress(Math.floor(((i + 1) / segments.length) * 100));
            }

            showNotification('🔄 Processing...', 'info');
            const merged = new Blob(chunks, { type: 'video/mp2t' });
            const converted = await convertTStoMP4(merged, getFilenameFromPageTitle('mp4'));
            
            downloadedBlobs.set(videoData.url, converted);
            shareOrDownloadBlob(converted.blob, converted.filename, videoData);
        } catch(e) {
            showNotification('❌ Error: ' + e.message, 'error');
            updateProgress(0);
        }
    }

    async function shareOrDownloadBlob(blob, filename, videoData) {
        // If no blob (regular video file), try to fetch it to blob for sharing/downloading
        if (!blob && videoData.url) {
            try {
                showNotification('📥 Fetching video...', 'info');
                const res = await fetch(videoData.url);
                blob = await res.blob();
                filename = getFilenameFromPageTitle('mp4');
            } catch(e) {
                // Fallback to direct link open
                window.open(videoData.url, '_blank');
                return;
            }
        }

        if (navigator.share && navigator.canShare && navigator.canShare({ files: [new File([blob], filename, { type: 'video/mp4' })] })) {
            try {
                await navigator.share({ files: [new File([blob], filename, { type: 'video/mp4' })] });
                showNotification('✅ Shared', 'success');
            } catch(e) {
                triggerDownload(blob, filename);
            }
        } else {
            triggerDownload(blob, filename);
        }
        updateProgress(0);
    }

    function triggerDownload(blob, filename) {
        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = filename;
        document.body.appendChild(a);
        a.click();
        setTimeout(() => { document.body.removeChild(a); URL.revokeObjectURL(url); }, 1000);
        showNotification('✅ Downloaded', 'success');
    }

    function showNotification(msg, type) {
        const div = document.createElement('div');
        div.className = 'universal-video-notification';
        div.textContent = msg;
        div.style.cssText = `position:fixed;top:75px;left:15px;background:${type==='error'?'#ef4444':'#4ade80'};color:#fff;padding:10px;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,0.3);font-weight:bold;z-index:999999;`;
        document.body.appendChild(div);
        setTimeout(() => div.remove(), 3000);
    }

    function checkForVideos() {
        const videos = getUniqueVideos();
        if (videos.length > 0) {
            const btn = createFloatingButton();
            // Update icon based on onscreen status
            const hasOnScreen = videos.some(v => v.isOnScreen);
            btn.innerHTML = hasOnScreen ? '👁️' : (videos.length > 1 ? '⇓' : '▶');
            btn.style.borderColor = hasOnScreen ? '#4ade80' : 'rgba(255,255,255,0.3)';
        } else if (floatingButton) {
            floatingButton.parentNode.remove();
            floatingButton = null;
        }
    }

    // --- X/Twitter Specific Module ---
    function initTwitterSupport() {
        if (!isTwitter) return;
        debugLog('[TWITTER] Initializing X/Twitter module');

        const downloadIconSVG = `
            <g><path d="M12 16 17.7 10.3 16.29 8.88 13 12.18 V2.59 h-2 v9.59 L7.7 8.88 6.29 10.3 Z M21 15l-.02 3.51c0 1.38-1.12 2.49-2.5 2.49H5.5C4.11 21 3 19.88 3 18.5V15h2v3.5c0 .28.22.5.5.5h12.98c.28 0 .5-.22.5-.5L19 15h2z" fill="currentColor"></path></g>
        `;

        const processTweet = (article) => {
            // Find the action bar (Reply, Retweet, Like, Share...)
            const group = article.querySelector('div[role="group"]');
            if (!group || group.querySelector('.tmd-down')) return;

            // Create button
            const btn = document.createElement('div');
            btn.className = 'tmd-down';
            btn.innerHTML = `<svg viewBox="0 0 24 24">${downloadIconSVG}</svg>`;
            btn.title = 'Download Media';

            // Insert before the share button (usually the last one)
            const shareBtn = group.lastElementChild;
            if (shareBtn) group.insertBefore(btn, shareBtn);

            btn.onclick = async (e) => {
                e.stopPropagation();
                if (btn.classList.contains('downloading')) return;
                
                btn.classList.add('downloading');
                
                // 1. Find media in this specific tweet
                const videos = article.querySelectorAll('video');
                const images = article.querySelectorAll('img[src*="pbs.twimg.com/media"]');
                
                let targetUrl = null;
                let isM3U8 = false;

                // Prioritize Video
                if (videos.length > 0) {
                    // Try to find the highest quality video URL
                    // Twitter often uses blob: URLs for videos now. 
                    // We need to match this blob to our captured M3U8s.
                    const videoEl = videos[0];
                    if (videoEl.src.startsWith('blob:')) {
                        // Look in our captured M3U8s for one that was detected recently
                        const recentM3U8 = Array.from(allDetectedVideos.values())
                            .filter(v => v.type === 'm3u8')
                            .sort((a,b) => b.timestamp - a.timestamp)[0];
                        
                        if (recentM3U8) {
                            targetUrl = recentM3U8.url;
                            isM3U8 = true;
                        }
                    } else {
                        targetUrl = videoEl.src;
                    }
                } else if (images.length > 0) {
                    // Fallback to Image (High Res)
                    targetUrl = images[0].src.replace(/name=[^&]+/, 'name=orig');
                }

                if (targetUrl) {
                    const videoData = isM3U8 
                        ? allDetectedVideos.get(targetUrl) 
                        : { url: targetUrl, type: 'video', title: 'Twitter Media' };
                    
                    if (videoData) {
                        processVideoAction(videoData);
                    } else {
                        // Create temp data object for direct image/video
                        processVideoAction({ url: targetUrl, type: 'video', title: 'Twitter Media' });
                    }
                } else {
                    showNotification('❌ No media found in this tweet', 'error');
                }

                setTimeout(() => btn.classList.remove('downloading'), 1000);
            };
        };

        const observer = new MutationObserver((mutations) => {
            for (const m of mutations) {
                m.addedNodes.forEach(node => {
                    if (node.nodeType === 1) {
                        // Check if node is a tweet or contains tweets
                        if (node.matches('article[data-testid="tweet"]')) processTweet(node);
                        node.querySelectorAll?.('article[data-testid="tweet"]').forEach(processTweet);
                    }
                });
            }
        });

        observer.observe(document.body, { childList: true, subtree: true });
        // Initial check
        document.querySelectorAll('article[data-testid="tweet"]').forEach(processTweet);
    }

    // --- Debug Console ---
    function debugLog(msg) {
        const log = `[${new Date().toLocaleTimeString()}] ${msg}`;
        debugLogs.push(log);
        if (debugMode && debugConsole) {
            const el = document.createElement('div');
            el.textContent = log;
            el.style.borderBottom = '1px solid #333';
            debugConsole.appendChild(el);
            debugConsole.scrollTop = debugConsole.scrollHeight;
        }
    }

    function createDebugConsole() {
        if (debugConsole) return;
        debugConsole = document.createElement('div');
        debugConsole.id = 'debug-console';
        debugConsole.style.cssText = 'position:fixed;bottom:10px;left:10px;right:10px;height:200px;background:rgba(0,0,0,0.9);color:#0f0;font-family:monospace;font-size:10px;overflow-y:auto;padding:10px;border:1px solid #0f0;';
        
        const close = document.createElement('button');
        close.textContent = 'CLOSE';
        close.style.cssText = 'position:sticky;top:0;float:right;background:red;color:white;border:none;cursor:pointer;';
        close.onclick = () => { debugConsole.remove(); debugConsole = null; debugMode = false; };
        
        debugConsole.appendChild(close);
        debugLogs.forEach(l => {
            const d = document.createElement('div');
            d.textContent = l;
            d.style.borderBottom = '1px solid #333';
            debugConsole.appendChild(d);
        });
        document.body.appendChild(debugConsole);
    }

    // --- Initialization ---
    function init() {
        debugLog('Script Initialized');
        initTwitterSupport();
        setInterval(checkForVideos, 2000); // Check periodically
    }

    init();

})();