youtube replay-song button functionality

youtube-replay-button.js

/*
	Open your favourite music video, open chrome dev tools console (f12 and after that Esc).
	Copy/Paste the following code.
	Enjoy Replay self-clickable button! :)
*/

var playButton = $('.html5-player-chrome').children[1];

setInterval(function() {
	if(playButton.classList.contains('ytp-button-replay')) {
		playButton.click();
	}	
}, 1000);

Not working for me.
Chrome 42.0.2311.135 (64-bit);

Maybe new classes on youtube...

But following code should work.
Thank you!

var replayAction = $('.ytp-play-button');

setInterval(function(){
if(replayAction.getAttribute('aria-label') === null){
replayAction.click();
}
}, 1000);