preference, for example: "srt" or
"ass/srt/best"
--sub-lang LANGS Languages of the subtitles to download
- (optional) separated by commas, use IETF
- language tags like 'en,pt'
+ (optional) separated by commas, use --list-
+ subs for available language tags
## Authentication Options:
-u, --username USERNAME Login with this account ID