.custom-video-block {
    margin: 20px 0;
}

.custom-video-block.align-left {
    text-align: left;
}

.custom-video-block.align-center {
    text-align: center;
}

.custom-video-block.align-right {
    text-align: right;
}

.custom-video-block iframe,
.custom-video-block video {
    max-width: 100%;
}

iframe{
    width: 100%;
}