脚本采取的是缓存的方式下载，所以下载的文件由两部分组成——音频与视频
本人github主页：https://github.com/aefASAA/Online-video-download-script/tree/main
注意：需要等待视频观看完毕或者完成缓存才能开始下载，可以通过倍速观看
The script is downloaded as a cache, so the downloaded file consists of two parts - audio and video
Note: You need to wait for the video to finish watching or complete the cache before downloading, you can watch by double speed