@plone/volto/theme/themes/pastanaga/extras/videoembed.less

Volto

@videoIconSize: 100px;

.video-embed {
  position: relative;

  img {
    min-width: 100%;
    min-height: 100%;
  }

  button.video-play-button {
    position: absolute;
    top: calc(50% - @videoIconSize / 2);
    left: calc(50% - @videoIconSize / 2);
    width: @videoIconSize;
    height: @videoIconSize;
    border: 4px solid @white;
    border-radius: 50px;
    background: transparent;
    cursor: pointer;
  }
}