Download YouTube videos. Video formats are listed at the top of the watch page. Video links are tagged so that they can be downloaded easily.
youtube下载下来的视频是和音频分离的，你要同时下载音频下来，然后合并为完整的视频，我习惯用MKVToolNix，你可以试试看
Hi @Nitto-Huang, thanks for your feedback.
但是视频下来没有声音
This is expected. If you want minimal fuss, download 720p/MP4. For the others, the video and audio streams are separate and you have to mux them after downloading.
When I'm lazy, I use youtube-dl. :D
希望能出个中文版的使用说明
Is there any part that you don't understand / find hard to use? It's just right-click-and-save.
youtube视频下载下来没有声音
很棒的一个脚本，但是视频下来没有声音，希望能出个中文版的使用说明。