YouTube Skip Time Customizer

Customize YouTube skip time by arrow key and block Numpad0~Numpad9 function

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         YouTube Skip Time Customizer
// @namespace    http://tampermonkey.net/
// @version      2.0
// @description  Customize YouTube skip time by arrow key and block Numpad0~Numpad9 function
// @author       TrainingDummy1
// @match        https://www.youtube.com/watch*
// @match        https://www.youtube.com/shorts*
// @grant        none

// @license MIT
// ==/UserScript==
(function() {
	'use strict';

	// You can change this constant to customize skip time
	const step = 0.8;
	let video;
  let searchCount = 0;
  let searchIndex = setInterval(function() {
    video = document.querySelector('video[src]');
    if(!video) {
      if(searchCount < 10) {
			  console.error(`비디오 요소를 찾을 수 없습니다. searchCount: ${searchCount}`);
      }
      else {
        console.error(`비디오 요소를 찾을 수 없습니다. 기능이 비활성화 됩니다.`);
        clearInterval(searchIndex);
      }
    }
    else {
      clearInterval(searchIndex);
    }
  }, 500)

	document.addEventListener('keydown', function(event) {
		// 입력이 콘텐츠 편집 영역에서 발생하지 않는지 확인
		if(event.target.getAttribute('contenteditable') !== 'true' && event.target.id !== 'contenteditable-root') {

			// ArrowRight 또는 ArrowLeft 키 눌렀을 때
			if(event.key === 'ArrowRight' || event.key === 'ArrowLeft') {
				event.preventDefault();
				event.stopPropagation();

        if(!video || isNaN(video.duration) || isNaN(video.currentTime)) {
          video = document.querySelector('video[src]');
        }

				const direction = event.key === 'ArrowRight' ? 1 : -1;
				const targetTime = Math.max(0, Math.min(video.duration, video.currentTime + direction * step));

				// 정확하게 이동하기 위한 보정 함수
				let retries = 0;
				const maxRetries = 5;
				const tolerance = 0.15;

				function accurateSeek() {
					video.currentTime = targetTime;

					if(Math.abs(video.currentTime - targetTime) < tolerance || retries >= maxRetries) {
						return;
					}

					retries++;
					setTimeout(accurateSeek, 100);
				}

				accurateSeek();
			}
			// Numpad 동작 차단
			else if(event.code.match(/Numpad\d/)) {
				event.preventDefault();
				event.stopPropagation();
			}
		}
	}, true);

	console.log(`화살표 키로 정확하게 ${step}초씩 이동하는 기능이 활성화되었습니다.`);
})();