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// ==UserScript==
// @name YouTube Enhancer (Loop & Screenshot Buttons)
// @description Add Loop, Save and Copy Screenshot Buttons.
// @icon https://raw.githubusercontent.com/exyezed/youtube-enhancer/refs/heads/main/extras/youtube-enhancer.png
// @version 1.5
// @author exyezed
// @namespace https://github.com/exyezed/youtube-enhancer/
// @supportURL https://github.com/exyezed/youtube-enhancer/issues
// @license MIT
// @match https://www.youtube.com/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
const buttonConfig = {
screenshotFormat: "png",
extension: 'png',
clickDuration: 500
};
const buttonCSS = `
a.buttonLoopAndScreenshot-loop-button,
a.buttonLoopAndScreenshot-save-screenshot-button,
a.buttonLoopAndScreenshot-copy-screenshot-button {
text-align: center;
position: relative;
display: flex;
align-items: center;
justify-content: center;
width: 48px;
height: 48px;
}
a.buttonLoopAndScreenshot-loop-button svg,
a.buttonLoopAndScreenshot-save-screenshot-button svg,
a.buttonLoopAndScreenshot-copy-screenshot-button svg {
width: 24px;
height: 24px;
vertical-align: middle;
transition: fill 0.2s ease;
}
a.buttonLoopAndScreenshot-loop-button:hover svg,
a.buttonLoopAndScreenshot-save-screenshot-button:hover svg,
a.buttonLoopAndScreenshot-copy-screenshot-button:hover svg {
fill: url(#buttonGradient);
}
a.buttonLoopAndScreenshot-loop-button.active svg,
a.buttonLoopAndScreenshot-save-screenshot-button.clicked svg,
a.buttonLoopAndScreenshot-copy-screenshot-button.clicked svg {
fill: url(#successGradient);
}
.buttonLoopAndScreenshot-shorts-save-button,
.buttonLoopAndScreenshot-shorts-copy-button {
display: flex;
align-items: center;
justify-content: center;
margin-top: 16px;
width: 48px;
height: 48px;
border-radius: 50%;
cursor: pointer;
transition: background-color 0.3s;
}
.buttonLoopAndScreenshot-shorts-save-button svg,
.buttonLoopAndScreenshot-shorts-copy-button svg {
width: 24px;
height: 24px;
transition: fill 0.1s ease;
}
.buttonLoopAndScreenshot-shorts-save-button svg path,
.buttonLoopAndScreenshot-shorts-copy-button svg path {
transition: fill 0.1s ease;
}
.buttonLoopAndScreenshot-shorts-save-button:hover svg path,
.buttonLoopAndScreenshot-shorts-copy-button:hover svg path {
fill: url(#shortsButtonGradient) !important;
}
.buttonLoopAndScreenshot-shorts-save-button.clicked svg path,
.buttonLoopAndScreenshot-shorts-copy-button.clicked svg path {
fill: url(#shortsSuccessGradient) !important;
}
html[dark] .buttonLoopAndScreenshot-shorts-save-button,
html[dark] .buttonLoopAndScreenshot-shorts-copy-button {
background-color: rgba(255, 255, 255, 0.1);
}
html[dark] .buttonLoopAndScreenshot-shorts-save-button:hover,
html[dark] .buttonLoopAndScreenshot-shorts-copy-button:hover {
background-color: rgba(255, 255, 255, 0.2);
}
html[dark] .buttonLoopAndScreenshot-shorts-save-button svg path,
html[dark] .buttonLoopAndScreenshot-shorts-copy-button svg path {
fill: white;
}
html:not([dark]) .buttonLoopAndScreenshot-shorts-save-button,
html:not([dark]) .buttonLoopAndScreenshot-shorts-copy-button {
background-color: rgba(0, 0, 0, 0.05);
}
html:not([dark]) .buttonLoopAndScreenshot-shorts-save-button:hover,
html:not([dark]) .buttonLoopAndScreenshot-shorts-copy-button:hover {
background-color: rgba(0, 0, 0, 0.1);
}
html:not([dark]) .buttonLoopAndScreenshot-shorts-save-button svg path,
html:not([dark]) .buttonLoopAndScreenshot-shorts-copy-button svg path {
fill: #030303;
}
`;
const iconUtils = {
createGradientDefs(isShortsButton = false) {
const defs = document.createElementNS('http://www.w3.org/2000/svg', 'defs');
const hoverGradient = document.createElementNS('http://www.w3.org/2000/svg', 'linearGradient');
hoverGradient.setAttribute('id', isShortsButton ? 'shortsButtonGradient' : 'buttonGradient');
hoverGradient.setAttribute('x1', '0%');
hoverGradient.setAttribute('y1', '0%');
hoverGradient.setAttribute('x2', '100%');
hoverGradient.setAttribute('y2', '100%');
const hoverStop1 = document.createElementNS('http://www.w3.org/2000/svg', 'stop');
hoverStop1.setAttribute('offset', '0%');
hoverStop1.setAttribute('style', 'stop-color:#f03');
const hoverStop2 = document.createElementNS('http://www.w3.org/2000/svg', 'stop');
hoverStop2.setAttribute('offset', '100%');
hoverStop2.setAttribute('style', 'stop-color:#ff2791');
hoverGradient.appendChild(hoverStop1);
hoverGradient.appendChild(hoverStop2);
defs.appendChild(hoverGradient);
const successGradient = document.createElementNS('http://www.w3.org/2000/svg', 'linearGradient');
successGradient.setAttribute('id', isShortsButton ? 'shortsSuccessGradient' : 'successGradient');
successGradient.setAttribute('x1', '0%');
successGradient.setAttribute('y1', '0%');
successGradient.setAttribute('x2', '100%');
successGradient.setAttribute('y2', '100%');
const successStop1 = document.createElementNS('http://www.w3.org/2000/svg', 'stop');
successStop1.setAttribute('offset', '0%');
successStop1.setAttribute('style', 'stop-color:#0f9d58');
const successStop2 = document.createElementNS('http://www.w3.org/2000/svg', 'stop');
successStop2.setAttribute('offset', '100%');
successStop2.setAttribute('style', 'stop-color:#00c853');
successGradient.appendChild(successStop1);
successGradient.appendChild(successStop2);
defs.appendChild(successGradient);
return defs;
},
createBaseSVG(viewBox, fill = '#e8eaed', isShortsButton = false) {
const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
svg.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
svg.setAttribute('height', '24px');
svg.setAttribute('viewBox', viewBox);
svg.setAttribute('width', '24px');
svg.setAttribute('fill', fill);
svg.appendChild(this.createGradientDefs(isShortsButton));
return svg;
},
paths: {
loopPath: 'M220-260q-92 0-156-64T0-480q0-92 64-156t156-64q37 0 71 13t61 37l68 62-60 54-62-56q-16-14-36-22t-42-8q-58 0-99 41t-41 99q0 58 41 99t99 41q22 0 42-8t36-22l310-280q27-24 61-37t71-13q92 0 156 64t64 156q0 92-64 156t-156 64q-37 0-71-13t-61-37l-68-62 60-54 62 56q16 14 36 22t42 8q58 0 99-41t41-99q0-58-41-99t-99-41q-22 0-42 8t-36 22L352-310q-27 24-61 37t-71 13Z',
screenshotPath: 'M20 5h-3.17l-1.24-1.35A2 2 0 0 0 14.12 3H9.88c-.56 0-1.1.24-1.47.65L7.17 5H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2m-3 12H7a.5.5 0 0 1-.4-.8l2-2.67c.2-.27.6-.27.8 0L11.25 16l2.6-3.47c.2-.27.6-.27.8 0l2.75 3.67a.5.5 0 0 1-.4.8',
copyScreenshotPath: 'M9 14h10l-3.45-4.5l-2.3 3l-1.55-2zm-1 4q-.825 0-1.412-.587T6 16V4q0-.825.588-1.412T8 2h12q.825 0 1.413.588T22 4v12q0 .825-.587 1.413T20 18zm0-2h12V4H8zm-4 6q-.825 0-1.412-.587T2 20V6h2v14h14v2zM8 4h12v12H8z'
},
createLoopIcon() {
const svg = this.createBaseSVG('0 -960 960 960');
const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
path.setAttribute('d', this.paths.loopPath);
svg.appendChild(path);
return svg;
},
createSaveScreenshotIcon(isShortsButton = false) {
const svg = this.createBaseSVG('0 0 24 24', '#e8eaed', isShortsButton);
const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
path.setAttribute('d', this.paths.screenshotPath);
svg.appendChild(path);
return svg;
},
createCopyScreenshotIcon(isShortsButton = false) {
const svg = this.createBaseSVG('0 0 24 24', '#e8eaed', isShortsButton);
const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
path.setAttribute('d', this.paths.copyScreenshotPath);
svg.appendChild(path);
return svg;
}
};
const buttonUtils = {
addStyle(styleString) {
const style = document.createElement('style');
style.textContent = styleString;
document.head.append(style);
},
getVideoId() {
const urlParams = new URLSearchParams(window.location.search);
return urlParams.get('v') || window.location.pathname.split('/').pop();
},
getApiKey() {
const scripts = document.getElementsByTagName('script');
for (const script of scripts) {
const match = script.textContent.match(/"INNERTUBE_API_KEY":\s*"([^"]+)"/);
if (match && match[1]) return match[1];
}
return null;
},
getClientInfo() {
const scripts = document.getElementsByTagName('script');
let clientName = null;
let clientVersion = null;
for (const script of scripts) {
const nameMatch = script.textContent.match(/"INNERTUBE_CLIENT_NAME":\s*"([^"]+)"/);
const versionMatch = script.textContent.match(/"INNERTUBE_CLIENT_VERSION":\s*"([^"]+)"/);
if (nameMatch && nameMatch[1]) clientName = nameMatch[1];
if (versionMatch && versionMatch[1]) clientVersion = versionMatch[1];
}
return { clientName, clientVersion };
},
async fetchVideoDetails(videoId) {
try {
const apiKey = this.getApiKey();
if (!apiKey) return null;
const { clientName, clientVersion } = this.getClientInfo();
if (!clientName || !clientVersion) return null;
const response = await fetch(`https://www.youtube.com/youtubei/v1/player?key=${apiKey}`, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
videoId: videoId,
context: {
client: {
clientName: clientName,
clientVersion: clientVersion,
}
}
})
});
if (!response.ok) return null;
const data = await response.json();
if (data && data.videoDetails && data.videoDetails.title) {
return data.videoDetails.title;
}
return 'YouTube Video';
} catch (error) {
return 'YouTube Video';
}
},
async getVideoTitle(callback) {
const videoId = this.getVideoId();
const title = await this.fetchVideoDetails(videoId);
callback(title || 'YouTube Video');
},
formatTime(time) {
const date = new Date();
const dateString = `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}`;
const timeString = [
Math.floor(time / 3600),
Math.floor((time % 3600) / 60),
Math.floor(time % 60)
].map(v => v.toString().padStart(2, '0')).join('-');
return `${dateString} ${timeString}`;
},
async copyToClipboard(blob) {
const clipboardItem = new ClipboardItem({ "image/png": blob });
await navigator.clipboard.write([clipboardItem]);
},
downloadScreenshot(blob, filename) {
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.style.display = 'none';
a.href = url;
a.download = filename;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
URL.revokeObjectURL(url);
},
captureScreenshot(player, action = 'download') {
if (!player) return;
const canvas = document.createElement("canvas");
canvas.width = player.videoWidth;
canvas.height = player.videoHeight;
canvas.getContext('2d').drawImage(player, 0, 0, canvas.width, canvas.height);
this.getVideoTitle((title) => {
const time = player.currentTime;
const filename = `${title} ${this.formatTime(time)}.${buttonConfig.extension}`;
canvas.toBlob(async (blob) => {
if (action === 'copy') {
await this.copyToClipboard(blob);
} else {
this.downloadScreenshot(blob, filename);
}
}, `image/${buttonConfig.screenshotFormat}`);
});
}
};
const regularVideo = {
init() {
this.waitForControls().then(() => {
this.insertLoopElement();
this.insertSaveScreenshotElement();
this.insertCopyScreenshotElement();
this.addObserver();
this.addContextMenuListener();
});
},
waitForControls() {
return new Promise((resolve, reject) => {
let attempts = 0;
const maxAttempts = 50;
const checkControls = () => {
const controls = document.querySelector('div.ytp-left-controls');
if (controls) {
resolve(controls);
} else if (attempts >= maxAttempts) {
reject(new Error('Controls not found after maximum attempts'));
} else {
attempts++;
setTimeout(checkControls, 100);
}
};
checkControls();
});
},
insertLoopElement() {
const controls = document.querySelector('div.ytp-left-controls');
if (!controls) return;
if (document.querySelector('.buttonLoopAndScreenshot-loop-button')) return;
const newButton = document.createElement('a');
newButton.classList.add('ytp-button', 'buttonLoopAndScreenshot-loop-button');
newButton.title = 'Loop Video';
newButton.appendChild(iconUtils.createLoopIcon());
newButton.addEventListener('click', this.toggleLoopState);
controls.appendChild(newButton);
},
insertSaveScreenshotElement() {
const controls = document.querySelector('div.ytp-left-controls');
if (!controls) return;
if (document.querySelector('.buttonLoopAndScreenshot-save-screenshot-button')) return;
const newButton = document.createElement('a');
newButton.classList.add('ytp-button', 'buttonLoopAndScreenshot-save-screenshot-button');
newButton.title = 'Save Screenshot';
newButton.appendChild(iconUtils.createSaveScreenshotIcon());
newButton.addEventListener('click', this.handleSaveScreenshotClick);
const loopButton = document.querySelector('.buttonLoopAndScreenshot-loop-button');
if (loopButton) {
loopButton.parentNode.insertBefore(newButton, loopButton.nextSibling);
} else {
controls.appendChild(newButton);
}
},
insertCopyScreenshotElement() {
const controls = document.querySelector('div.ytp-left-controls');
if (!controls) return;
if (document.querySelector('.buttonLoopAndScreenshot-copy-screenshot-button')) return;
const newButton = document.createElement('a');
newButton.classList.add('ytp-button', 'buttonLoopAndScreenshot-copy-screenshot-button');
newButton.title = 'Copy Screenshot to Clipboard';
newButton.appendChild(iconUtils.createCopyScreenshotIcon());
newButton.addEventListener('click', this.handleCopyScreenshotClick);
const saveButton = document.querySelector('.buttonLoopAndScreenshot-save-screenshot-button');
if (saveButton) {
saveButton.parentNode.insertBefore(newButton, saveButton.nextSibling);
} else {
controls.appendChild(newButton);
}
},
toggleLoopState() {
const video = document.querySelector('video');
video.loop = !video.loop;
if (video.loop) video.play();
regularVideo.updateToggleControls();
},
updateToggleControls() {
const youtubeVideoLoop = document.querySelector('.buttonLoopAndScreenshot-loop-button');
youtubeVideoLoop.classList.toggle('active');
youtubeVideoLoop.setAttribute('title', this.isActive() ? 'Stop Looping' : 'Loop Video');
},
isActive() {
const youtubeVideoLoop = document.querySelector('.buttonLoopAndScreenshot-loop-button');
return youtubeVideoLoop.classList.contains('active');
},
addObserver() {
const video = document.querySelector('video');
new MutationObserver((mutations) => {
mutations.forEach(() => {
if ((video.getAttribute('loop') === null && this.isActive()) ||
(video.getAttribute('loop') !== null && !this.isActive())) this.updateToggleControls();
});
}).observe(video, { attributes: true, attributeFilter: ['loop'] });
},
addContextMenuListener() {
const video = document.querySelector('video');
video.addEventListener('contextmenu', () => {
setTimeout(() => {
const checkbox = document.querySelector('[role=menuitemcheckbox]');
checkbox.setAttribute('aria-checked', this.isActive());
checkbox.addEventListener('click', this.toggleLoopState);
}, 50);
});
},
handleSaveScreenshotClick(event) {
const button = event.currentTarget;
button.classList.add('clicked');
setTimeout(() => {
button.classList.remove('clicked');
}, buttonConfig.clickDuration);
const player = document.querySelector('video');
buttonUtils.captureScreenshot(player, 'download');
},
handleCopyScreenshotClick(event) {
const button = event.currentTarget;
button.classList.add('clicked');
setTimeout(() => {
button.classList.remove('clicked');
}, buttonConfig.clickDuration);
const player = document.querySelector('video');
buttonUtils.captureScreenshot(player, 'copy');
}
};
const shortsVideo = {
init() {
this.insertSaveScreenshotElement();
this.insertCopyScreenshotElement();
},
insertSaveScreenshotElement() {
const shortsContainer = document.querySelector('ytd-reel-video-renderer[is-active] #actions');
if (shortsContainer && !shortsContainer.querySelector('.buttonLoopAndScreenshot-shorts-save-button')) {
const iconDiv = document.createElement('div');
iconDiv.className = 'buttonLoopAndScreenshot-shorts-save-button';
iconDiv.title = 'Save Screenshot';
iconDiv.appendChild(iconUtils.createSaveScreenshotIcon(true));
const customShortsIcon = shortsContainer.querySelector('#custom-shorts-icon');
if (customShortsIcon) {
customShortsIcon.parentNode.insertBefore(iconDiv, customShortsIcon);
} else {
shortsContainer.insertBefore(iconDiv, shortsContainer.firstChild);
}
iconDiv.addEventListener('click', (event) => {
const button = event.currentTarget;
button.classList.add('clicked');
setTimeout(() => {
button.classList.remove('clicked');
}, buttonConfig.clickDuration);
this.captureScreenshot('download');
});
}
},
insertCopyScreenshotElement() {
const shortsContainer = document.querySelector('ytd-reel-video-renderer[is-active] #actions');
if (shortsContainer && !shortsContainer.querySelector('.buttonLoopAndScreenshot-shorts-copy-button')) {
const iconDiv = document.createElement('div');
iconDiv.className = 'buttonLoopAndScreenshot-shorts-copy-button';
iconDiv.title = 'Copy Screenshot to Clipboard';
iconDiv.appendChild(iconUtils.createCopyScreenshotIcon(true));
const saveButton = shortsContainer.querySelector('.buttonLoopAndScreenshot-shorts-save-button');
if (saveButton) {
saveButton.parentNode.insertBefore(iconDiv, saveButton.nextSibling);
} else {
const customShortsIcon = shortsContainer.querySelector('#custom-shorts-icon');
if (customShortsIcon) {
customShortsIcon.parentNode.insertBefore(iconDiv, customShortsIcon);
} else {
shortsContainer.insertBefore(iconDiv, shortsContainer.firstChild);
}
}
iconDiv.addEventListener('click', (event) => {
const button = event.currentTarget;
button.classList.add('clicked');
setTimeout(() => {
button.classList.remove('clicked');
}, buttonConfig.clickDuration);
this.captureScreenshot('copy');
});
}
},
captureScreenshot(action) {
const player = document.querySelector('ytd-reel-video-renderer[is-active] video');
buttonUtils.captureScreenshot(player, action);
}
};
const themeHandler = {
init() {
this.updateStyles();
this.addObserver();
},
updateStyles() {
const isDarkTheme = document.documentElement.hasAttribute('dark');
document.documentElement.classList.toggle('dark-theme', isDarkTheme);
},
addObserver() {
const observer = new MutationObserver(() => this.updateStyles());
observer.observe(document.documentElement, {
attributes: true,
attributeFilter: ['dark']
});
}
};
function initialize() {
buttonUtils.addStyle(buttonCSS);
waitForVideo().then(initializeWhenReady);
}
function waitForVideo() {
return new Promise((resolve) => {
const checkVideo = () => {
if (document.querySelector('video')) {
resolve();
} else {
setTimeout(checkVideo, 100);
}
};
checkVideo();
});
}
function initializeWhenReady() {
initializeFeatures();
}
function initializeFeatures() {
regularVideo.init();
themeHandler.init();
initializeShortsFeatures();
}
function initializeShortsFeatures() {
if (window.location.pathname.includes('/shorts/')) {
setTimeout(shortsVideo.init.bind(shortsVideo), 500);
}
}
const shortsObserver = new MutationObserver((mutations) => {
for (let mutation of mutations) {
if (mutation.type === 'childList') {
initializeShortsFeatures();
}
}
});
shortsObserver.observe(document.body, { childList: true, subtree: true });
window.addEventListener('yt-navigate-finish', initializeShortsFeatures);
document.addEventListener('yt-action', function(event) {
if (event.detail && event.detail.actionName === 'yt-reload-continuation-items-command') {
initializeShortsFeatures();
}
});
initialize();
})();