.twitch .twitch-video {
    padding-top: 56.25%;
    position: relative;
    height: 0;
}
.twitch .twitch-video iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
}
.twitch .twitch-chat {
    height:400px;
}
.twitch .twich-chat iframe {
    width: 100%;
    height: 100%;
}

@media screen and (min-width: 850px) {
    .twitch {
      position: relative;
    }
  
    .twitch .twitch-video {
      width: 75%;
      padding-top: 42.1875%;
    }
  
    .twitch .twitch-chat {
      width: 25%;
      height: auto;
      position: absolute;
      top: 0;
      right: 0;
      bottom: 0;
    }
  }