.thumb { width: 160px; height: 90px; border: 0px; }
.container { width: 580px; margin: 20px 0px auto; }
.flex-container {
  display: -webkit-flex;
  display: flex;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
}
.flex-item { width: 160px; margin: 5px; }
.item-caption { text-align: center; font-size: 10px; }