.youtube-video-container {
  padding-bottom: 56.25%;
  padding-top: 25px;
  height: 0;
}
.youtube-video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.music-button {
  position: fixed;
  bottom: 20px;
  left: 18px;
  cursor: pointer;
  z-index: 10 !important;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #FFFFFF50;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border: 1px solid rgba(222, 222, 222, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.music-button .play-icon { display: block; }
.music-button .pause-icon { display: none; }
.music-button:not(.paused) .play-icon { display: none; }
.music-button:not(.paused) .pause-icon { display: block; }