ArtPlayer/packages/artplayer/src/style/selector.scss

.art-video-player {
    .art-control-selector {
        position: relative;
        .art-selector-list {
            display: none;
            position: absolute;
            bottom: 35px;
            width: 100px;
            padding: 5px 0;
            text-align: center;
            color: #fff;
            background: rgba(0, 0, 0, 0.8);
            border-radius: 3px;
            .art-selector-item {
                height: 30px;
                line-height: 30px;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
                text-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
                &:hover {
                    background-color: rgba(255, 255, 255, 0.1);
                }
            }
        }
        &:hover .art-selector-list {
            display: block;
        }
    }
}