YT Scroll Rewind

Mouse wheel rewind over YouTube video

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

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

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

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

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

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.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         YT Scroll Rewind
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Mouse wheel rewind over YouTube video
// @author       You
// @match        https://www.youtube.com/watch*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    // === Config / Настройки ===
    const config = {
        seekTime: 5,        // Seconds to seek per wheel step / Секунд за один шаг колеса
        deadZonePercent: 20 // Ignore edges (%) / Игнорировать края плеера (%)
    };

    // YouTube player container / Контейнер плеера YouTube
    function getPlayer() {
        return document.querySelector('.html5-video-player');
    }

    // HTML5 <video> element / Сам элемент видео
    function getVideo() {
        return document.querySelector('video');
    }

    // Check cursor inside player rect / Курсор внутри плеера
    function isInside(e, rect) {
        return (
            e.clientX >= rect.left && e.clientX <= rect.right &&
            e.clientY >= rect.top  && e.clientY <= rect.bottom
        );
    }

    // Dead zone near edges (avoid conflicts with UI) /
    // Мёртвая зона по краям (чтобы не мешать интерфейсу)
    function isInDeadZone(e, rect) {
        const dz = config.deadZonePercent / 100;
        const x = e.clientX - rect.left;
        const y = e.clientY - rect.top;

        return (
            x < rect.width * dz ||
            x > rect.width * (1 - dz) ||
            y < rect.height * dz ||
            y > rect.height * (1 - dz)
        );
    }

    // Main wheel handler / Основная логика прокрутки
    function handleWheel(e) {
        const player = getPlayer();
        const video = getVideo();
        if (!player || !video) return;

        const rect = player.getBoundingClientRect();
        if (!isInside(e, rect)) return;
        if (isInDeadZone(e, rect)) return;

        // Block YouTube default scroll behavior /
        // Блокируем стандартное поведение YouTube
        e.preventDefault();
        e.stopImmediatePropagation();

        // Scroll up = back, down = forward /
        // Вверх — назад, вниз — вперёд
        video.currentTime += e.deltaY < 0 ? -config.seekTime : config.seekTime;

        // Clamp to video duration /
        // Ограничение в пределах видео
        video.currentTime = Math.max(0, Math.min(video.duration, video.currentTime));
    }

    // Capture phase + passive:false is REQUIRED /
    // Захват + passive:false ОБЯЗАТЕЛЬНЫ
    document.addEventListener('wheel', handleWheel, {
        passive: false,
        capture: true
    });

    // Optional external access to config /
    // Необязательный доступ к настройкам извне
    window.ytScrollConfig = config;
})();