.wrapper {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin-bottom: 10px;
    width: 100%;
}
#video {
    width: 45%;
    min-width: 310px;
    border: 2px solid #aaa;
    transform: rotateY(180deg);
}
#myCanvas2 {
    width: 45%;
    min-width: 310px;
    border: 2px solid #aaa;
    transform: rotateY(180deg);
}