Detectar tempo de término de um vídeo iflame

<div class="embed-container" >

	<div id="selectdivid" >
	<select name="selectvideoname" id="selectvideoid" >
 <option value="0" selected="selected" >selecione um video</option>
 <option value="https://drive.google.com/file/d/0B9lGzJO03DiydlY0M2lfdHlZS0U/preview">video1</option>
 <option value="https://meuip.link/l/QUQ2djVkeGVJM0Z6SzZLMHg2ZHN4YzZZZmlqRlRaVU1yNGt4ZDcwN3hGV0psa2RiN0RWMVlJbmhvN25yY2RmRHREUk44U1owTUlyaVFDMWN3OHQ3M0pfaXVNZDRJSGE5ZGpmQjZzazJEYk83NGgybi00d0UzcGpTUjhaSV9wOFVGVDYwcWZBZkxEczA0OjI5OjE2MjAxOS0wOS0zMA">video2</option>
 <option value="https://www.youtube.com/embed/LeAkYuMDVGY?enablejsapi=1">video3</option>
 <option value="videos.html">video4</option>
 </select></div>

	<iframe
	name="iframevideoname"
 id="iframevideoid"
	class="iframevideoclass"
 src="https://drive.google.com/file/d/0B9lGzJO03DiydlY0M2lfdHlZS0U/preview"

 width ="500"
 height ="500"
 allowfullscreen ="true"
	></iframe></div>

 <script>
 var select = document.querySelector('#selectvideoid');
 var iframe = document.querySelector('#iframevideoid');
	select.addEventListener('change',function(){
 iframe.src = this.value;
 })
	</script>

	boa noite , gostaria de saber se e possível apos terminar o vídeo de um iframe chamar uma função , pode ser um alerta.