Fork Copy Preview <html> <head> <title>Loop a part of video on Youtube</title> <style> * { font-size: 20px; font-family: monospace; } div { max-width: 1000px; margin: 10px auto; } .bookmark { display: inline-block; padding: 6px 12px; color: #eee; background: #4f72c9; text-decoration: none; font-weight: bold; border-radius: 4px; } </style> </head> <body> <div> <h1>Loop a part of video on Youtube</h1> <ol> <li> Drag and drop <a class="bookmark" href="javascript: (function () { function simpleLoop(startTime, endTime) { console.log('-- Run here'); var ytplayer = document.getElementById("movie_player"); var currentTime = ytplayer.getCurrentTime(); var isRunToStart = currentTime > startTime; var suitableTimeout = endTime - startTime; if (currentTime <= startTime || currentTime > endTime) { ytplayer.seekTo(startTime); } else { suitableTimeout = endTime - currentTime; } console.log('>> Start timeout after: ', suitableTimeout * 1000); setTimeout(function () { simpleLoop(startTime, endTime) }, suitableTimeout * 1000); } var savedTimerange = localStorage.getItem('simple_loop_' + location.href); var input = prompt('Time range: start,end', savedTimerange || ''); if (!input) { return; } localStorage.setItem('simple_loop_' + location.href, input); var arr = input.split(','); simpleLoop(parseInt(arr[0]), parseInt(arr[1])); })();"> Simple Loop </a> into bookmark bar. </li> <li> Open video on youtube. </li> <li> Click <strong>Simple Loop</strong> bookmark and type time range. </li> </ol> <p>View script <a href="https://code.nddcoder.com/v/lgk2ltud" target="_blank">here</a>.</p> </div> </body> </html>