hyouka.js

var buttonElements = document.getElementById('watch-like-dislike-buttons').getElementsByClassName('yt-uix-button-content');
var viewElement = document.getElementById('watch7-views-info');
var i = another = Number(buttonElements[0].innerHTML.replace(",",""));
var j = Number(buttonElements[1].innerHTML.replace(",",""));
var count = setInterval(function(){
	counter(i);
	i++;
	if(i >= another+1000){
		clearInterval(count);
		}
	},10);
function counter(num){
	buttonElements[0].innerHTML = String(num).replace(/(\d)(?=(\d\d\d)+(?!\d))/g,'$1,');
	viewElement.getElementsByClassName('video-extras-sparkbar-likes')[0].style.width = 100*num/(num+j)+'%';
	viewElement.getElementsByClassName('video-extras-sparkbar-dislikes')[0].style.width = 100*j/(num+j)+'%';
}