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.
This is expected. The only two videos with audio are 720P/MP4 and 360P/MP4, for legacy devices.
For others, you need to download the audio stream separately and mux them yourself. Some media players will automatically look for the audio file with the same name as the video file.
下载的视频没有声音呢
为什么我下载的mv都没有声音呢？ 1080p的，其他的没有试