.block-editor-block-list__layout .block-editor-block-list__block .iframe-block {
    border: 1px solid #000;
    min-height: 50px;
    background: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #555;
	line-height: 0;
    font-size: 0;
}

.block-editor-block-list__layout .block-editor-block-list__block .iframe-block:before {
    content: 'Custom vimeo iframe';
	position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
	width: 100%;
	height: 100%;
	z-index: 1;
	top: 0;
	left: 0;
}
.block-editor-block-list__layout .block-editor-block-list__block .iframe-block * {
	display: none;
    line-height: 0;
    font-size: 0;
}
.block-editor-block-list__layout .block-editor-block-list__block .iframe-block iframe {
	position: relative;
	z-index: 2;
	display: block;
	pointer-events: none;
}