[Houshalter]

Hmm I don't see any documentation for that format code.

I chose mp3 because it's the only format my ipod accepts. The formats it downloads by default won't play, even if they might be higher quality.

[rg3]

youtube-dl -F VIDEO_URL will give you a list of formats in YouTube, that you can choose using the -f option. DASH streams contain only video or only audio normally.