我想从https://www.youtube.com/watch?v=0R0T0mQmx7I下载一个 youtube 流，并添加我喜欢的时间。因此使用 youtube-dl，我得到了它的所有格式：
$ youtube-dl --list-formats https://www.youtube.com/watch?v=0R0T0mQmx7I
[youtube] 0R0T0mQmx7I: Downloading webpage
[youtube] 0R0T0mQmx7I: Downloading video info webpage
[youtube] 0R0T0mQmx7I: Extracting video information
[youtube] 0R0T0mQmx7I: Downloading MPD manifest
[info] Available formats for 0R0T0mQmx7I:
format code extension resolution note
140 m4a audio only DASH audio 144k , m4a_dash container, mp4a.40.2@128k
160 mp4 256x144 144p 124k , avc1.42c00b, 30fps, video only
133 mp4 426x240 240p 258k , avc1.4d4015, 30fps, video only
134 mp4 640x360 360p 646k , avc1.4d401e, 30fps, video …