How can I adjust the video to fit the height of parent div?

.hero{
    position: relative;
    z-index: 1;
    height: 90vh;
    width: 100%;
}


#myVideo {
    position: absolute;
    right: 0;
    bottom: 0;
    z-index: -1; 
     filter: brightness(65%);
     height: 100%;
}

@media (min-aspect-ratio: 16/9) {
    #myVideo {
        width: 100%;
        height: auto;
    }
}

@media (max-aspect-ratio: 16/9) {
    #myVideo {
        width: 100%;
        height: auto;
    }
}