.mejs__video-description-button > button,
.mejs__audio-description-button > button {
    opacity: 0.7;
}

.mejs__video-description-button.video-description-on > button,
.mejs__audio-description-button.audio-description-on > button {
    opacity: 1;
}

.mejs__volume-button.hidden {
    display: none;
}

.mejs__audio-description-player {
    display: none;
}