.video-testimonial-wrapper{
  display: grid;
  grid-template-columns: auto auto auto;
  overflow: hidden;
  grid-gap: 10px;
}
.video-testimonial-wrapper > div{
  margin: 20px 0px;
  width: 100%;
}
.video-testimonial-box video{
  width: 100%;
  height: 300px;
}
@media only screen and (max-width: 767px){
  .video-testimonial-wrapper{
    grid-template-columns: auto;
  }
}