Audio and Video enhancement script, supports all H5 video websites, such as: Bilibili, Douyin, Tencent Video, Youku, iQiyi, Xigua Video, YouTube, Weibo Video, Zhihu Video, Sohu Video, NetEase Open Course, Baidu network disk, Alibaba cloud disk, ted, instagram, twitter, etc. Full shortcut key control, support: double-speed playback/accelerated playback, video screenshots, picture-in-picture, full-screen web pages, adjusting brightness, saturation, contrast
可不可以加一个按5，更改播放速度为1.5；按6，更改播放速度为1.6；
可不可以加一个按7，更改播放速度为1.7；按8，更改播放速度为1.8；
可不可以加一个按99，更改播放速度为1.9。