* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
    
  
}

body {
	font-family: Tahoma, Geneva, sans-serif;
    background-color:#97dd79; 
	margin: 0;
	padding: 0;
}
	
#pagina {
	width: 90%;
    margin: auto;
}
		
video {
	width:90%;
	height: auto;
    /*filter: blur(3px) grayscale(100%);*/
	margin: 1em;
}

.contenedor{
	width: 90%;
	margin: 1em;
}

.videoresponsive{
    position: relative;
	padding-bottom: 56.25%; /* 16:9 */
	/*padding-top: 25px;*/
	height: 0;
	overflow:hidden;
}

.videoresponsive iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}

iframe {
    border-radius: .5em;
    border:0.5em solid green;   
    
}