Tampermonkey script for youtube, that appends current time to the URL

youtube_cur_time.js

'use strict';
var checkCurrentTime = setInterval(function(){
    var $player = document.querySelector('#movie_player');
    if($player && $player.getCurrentTime()) {
        document.location.hash = 'start=' + $player.getCurrentTime();
    }// + ';end=20:22;cycles=-1;autoreplay=false
}, 5000);