.channel {
    margin-top: 80px;
    align-items: center;
}
  
.channel__heading {
    font-size: 32px;
    line-height: 45px;
}
  
.channel__intro {
    margin-top: 20px;
}
  
.channel__preview {
    height: 250px;
}
  
.channel__preview:nth-child(1),
.channel__preview:nth-child(3) {
    margin-right: 20px;
}
  
.channel__preview:nth-child(1),
.channel__preview:nth-child(2) {
    margin-bottom: 20px;
}
  
.channel .bi-youtube {
    margin-right: 10px;
    color: red;
}
  
@media all and (max-width: 767px) {
    .channel__preview {
      width: 100%;
      margin-right: 0 !important;
      height: 350px;
    }
  
    .channel__preview:not(:last-of-type) {
      margin-bottom: 40px;
    }
}