视频清晰度切换功能，保证切换另一个视频，切换成功后，时间是从切换之前接着的,求代码

<!--2.引进 mui-player 脚本文件-->
<script src="lib/muiplayer/release/mui-player/dist/mui-player.min.js"></script>
<link rel="stylesheet" href="lib/semantic/semantic.min.css">
<script src="lib/semantic/semantic.min.js"></script>

<!--2.1引入 mui-player PC脚本文件-->
<script src="lib/muiplayer/release/mui-player-desktop-plugin/dist/mui-player-desktop-plugin.min.js"></script>

<style>
    button[slot='fast-forward']{
        font-size: 18px !important;

    }
    button[slot='fast-backward']{
        font-size: 18px !important;
    }
    /*.heart {
         border-color: red;
     }*/
    button [slot="heart"]{
        color:red;
    }

</style>