h1.has-text-align-center.wp-block-post-title.has-x-large-font-size {
    display: none;
}

.jf-clip{position:relative;overflow:hidden;width:100%}
.jf-clip iframe{
  display:block;
  width:100%;
  height:100vh;            /* or a fixed height you prefer */
  position:relative;
  top:-56px;               /* crop amount */
  border:0 !important;
}