.responsive-video-player {
  position: relative;
  width: 100%;
  max-width: 703px;
  margin: 0 auto;
  padding-top: 56.25%; /* 16:9 Aspect Ratio */
  background: #000;
  overflow: hidden;
}
.responsive-video-player .video-thumb,
.responsive-video-player iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.responsive-video-player .play-btn {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 12vw; max-width: 64px; min-width: 40px;
  height: 12vw; max-height: 64px; min-height: 40px;
  background: rgba(0,0,0,0.6);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.responsive-video-player .play-btn svg {
  width: 50%; height: 50%;
  min-width: 24px; min-height: 24px;
  max-width: 40px; max-height: 40px;
}