## Video Format Options:
-f, --format FORMAT video format code, specify the order of
- preference using slashes: -f 22/17/18 . -f
- mp4 , -f m4a and -f flv are also
- supported. You can also use the special
- names "best", "bestvideo", "bestaudio",
- "worst", "worstvideo" and "worstaudio". By
- default, youtube-dl will pick the best
- quality. Use commas to download multiple
- audio formats, such as -f
+ preference using slashes, as in -f 22/17/18
+ . Instead of format codes, you can select
+ by extension for the extensions aac, m4a,
+ mp3, mp4, ogg, wav, webm. You can also use
+ the special names "best", "bestvideo",
+ "bestaudio", "worst". By default, youtube-
+ dl will pick the best quality. Use commas
+ to download multiple audio formats, such as
+ -f
136/137/mp4/bestvideo,140/m4a/bestaudio.
You can merge the video and audio of two
formats into a single file using -f <video-