Remembers the last watched time of videos on any website (including YouTube) and auto-deletes after 3 months
// ==UserScript==
// @name Video time tracker (localStorage)
// @namespace https://greasyfork.org/
// @version 1.0
// @description Remembers the last watched time of videos on any website (including YouTube) and auto-deletes after 3 months
// @author Bui Quoc Dung
// @match *://*/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
const EXPIRATION_DAYS = 90; // Days
const SAVE_INTERVAL = 1*1000; // Seconds*1000
const SHORT_VIDEO_TIME = 10; // Days
const YOUTUBE_URL_REGEX = /youtube\.com\/watch\?v=([^&]+)/;
// Function to save time
function saveTime(video, key) {
if (!video || video.duration < SHORT_VIDEO_TIME) return;
let data = { time: video.currentTime, timestamp: Date.now() };
localStorage.setItem(key, JSON.stringify(data));
}
// Function to load and restore time
function loadTime(video, key) {
let savedData = localStorage.getItem(key);
if (savedData) {
let data = JSON.parse(savedData);
let elapsedDays = (Date.now() - data.timestamp) / (1000 * 60 * 60 * 24);
if (elapsedDays < EXPIRATION_DAYS && !isNaN(data.time)) {
video.currentTime = parseFloat(data.time);
} else {
localStorage.removeItem(key); // Delete expired data
}
}
}
// Standard video handling
function handleVideo(video) {
if (!video || video.dataset.processed) return;
video.dataset.processed = true;
let key = `videoTime_${location.href}`;
loadTime(video, key);
let saveInterval = setInterval(() => saveTime(video, key), SAVE_INTERVAL);
video.addEventListener('pause', () => clearInterval(saveInterval));
}
// YouTube-specific handling using the IFrame API
function handleYouTube() {
let match = location.href.match(YOUTUBE_URL_REGEX);
if (!match) return;
let videoId = match[1];
let key = `youtubeTime_${videoId}`;
// Wait for the YouTube player to load
let checkPlayer = setInterval(() => {
let player = document.querySelector('.html5-main-video');
if (player) {
clearInterval(checkPlayer);
loadTime(player, key);
let saveInterval = setInterval(() => saveTime(player, key), SAVE_INTERVAL);
player.addEventListener('pause', () => clearInterval(saveInterval));
}
}, 1000);
}
// Observer to track new video elements
function init() {
if (location.hostname.includes('youtube.com')) {
handleYouTube();
} else {
let observer = new MutationObserver(() => {
document.querySelectorAll('video').forEach(video => handleVideo(video));
});
observer.observe(document.body, { childList: true, subtree: true });
}
}
window.addEventListener('load', init);
})();