@media (min-width: 800px) {
	.maingif2mp4 {
		width: 800px; 
		margin: 20px auto 20px;
	}
}
@media (max-width: 800px) {
	.maingif2mp4 {
		width: 100%; 
		margin: 20px auto 20px;
		padding-left: 5px;
		padding-right: 5px;
	}
}
@media (min-width: 980px) {
	.help_button {
		position: absolute; 
		top: 10px; 
		right: 10px;
	}
	.help_button button {
		display: block;
		margin-top: 5px;
		min-width: 64px;
	}
}
@media (max-width: 980px) {
	.help_button {
		margin: 10px 10px 20px 10px;
		text-align: center;
	}
	.help_button button {
		min-width: 64px;
	}
}

video {
	max-width: 300px;
	max-height: 160px;
	margin-top: 4px;
	margin-left: 5px;
}

.preview_area {
	text-align: center; 
	width: 310px; 
	height: 168px; 
	border: 1px solid #cccccc; 
	color: #cccccc; 
	line-height: 168px; 
	border-radius: 5px; 
	overflow: hidden; 
	float: right;
}