.ihumbak__video {
  width: 100%;
  position: relative;
  margin-bottom: 40px;
}
.ihumbak__video::before {
  content: '';
  display: block;
  padding-top: 56.25%;
}

.ihumbak__video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}