.field input.youtube {
    background-image: url('../images/field-icon-youtube.png');
    background-position: 6px center;
    background-repeat: no-repeat;
    background-size: 28px 20px;
    padding-left: 40px;
}
.field .youtube-active input.youtube {
	border-bottom-left-radius: 0;
	border-bottom-right-radius: 0;
	padding-right: 120px;
}

.field .youtube-info {
	display: none;
	background-color: #eee;
	border: 1px solid #b3b3b3;
	border-top: 0;
	border-bottom-left-radius: 4px;
	border-bottom-right-radius: 4px;
	height: 45px;
	width: 510px;
}
.field .youtube-active .youtube-info {
	display: block;
}

.field .youtube-info-thumb {
	float: right;
}

.field .youtube-info-title {
	font-size: 13px;
	font-weight: bold;
	padding: 7px 7px 0 7px;
	margin-bottom: 0;
}

.field .youtube-info-more {
	font-size: 11px;
	padding: 0px 7px 7px 7px;
	margin-bottom: 0;
}
.field input.youtube {
    background-image: url('../images/field-icon-youtube.png');
    background-position: 6px center;
    background-repeat: no-repeat;
    background-size: 28px 20px;
    padding-left: 40px;
}
.field .youtube-active input.youtube {
	border-bottom-left-radius: 0;
	border-bottom-right-radius: 0;
}

.field .youtube-info {
	display: none;
	background-color: #eee;
	border: 1px solid #b3b3b3;
	border-top: 0;
	border-bottom-left-radius: 4px;
	border-bottom-right-radius: 4px;
	height: 45px;
	width: 510px;
}
.field .youtube-active .youtube-info {
	display: block;
}

.field .youtube-info-thumb {
	float: right;
}

.field .youtube-info-title {
	font-size: 13px;
	font-weight: bold;
	padding: 7px 7px 0 7px;
	margin-bottom: 0;
}

.field .youtube-info-more {
	font-size: 11px;
	padding: 0px 7px 7px 7px;
	margin-bottom: 0;
}
Remove unnecessary padding from input field
Remove unnecessary padding from input field
