Untitled

<!doctype html>

<head>
	<script type="text/javascript">

		function przelacz(){

			//var los = Math.floor(Math.random()*2);
			//var filmik = ["https://www.youtube.com/embed/xgrjudvzgaA","https://www.youtube.com/embed/cmRQmsISE34"];

			var adres = document.getElementById("adres").value;
			document.getElementById("yt").src=adres;
		}

	</script>
</head>
<body>
	<div class="player">
		<iframe id="yt" width="560" height="315" src="https://www.youtube.com/embed/SbQc_JLUH7k?rel=0" frameborder="0" allowfullscreen></iframe><br><br>
		<input id="adres" type="text" style="width:500px;">
		<input type="submit" value="zmien" onclick="przelacz()"/>
	</div>

</body>

</html>