.player-container{
  width: 100%;
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
  gap:20px;
}

.player-container iframe.grille-videos {
 aspect-ratio: 16 / 9;
 width: 100% !important; max-width: 250px !important; min-width: 100px;
 height: auto !important;
 margin: auto;
}