.standard-video-description{width: 100% !important; height: auto; max-height: 80vh;}
.grid-chess-2 > *:first-of-type{grid-area:chess1}
.grid-chess-2 > *:last-of-type{grid-area:chess2}
.grid-chess-2{margin:30px auto}
.grid-chess-2:nth-of-type(odd){grid-template-areas:"chess1 chess2"}
.grid-chess-2:nth-of-type(even){grid-template-areas:"chess2 chess1"}

@media screen and (max-device-width: 550px){
.grid-chess-2:nth-of-type(odd){grid-template-columns:100%;grid-template-areas:"chess1 chess2";}
.grid-chess-2:nth-of-type(even){grid-template-columns:100%;grid-template-areas:"chess1 chess2";}
}