youtube-dl/devscripts/zsh-completion.in

#compdef youtube-dl

__youtube_dl() {
    local curcontext="$curcontext" fileopts diropts cur prev
    typeset -A opt_args
    fileopts="{{fileopts}}"
    diropts="{{diropts}}"
    cur=$words[CURRENT]
    case $cur in
        :)
            _arguments '*: :(::ytfavorites ::ytrecommended ::ytsubscriptions ::ytwatchlater ::ythistory)'
        ;;
        *)
            prev=$words[CURRENT-1]
            if [[ ${prev} =~ ${fileopts} ]]; then
                _path_files
            elif [[ ${prev} =~ ${diropts} ]]; then
                _path_files -/
            elif [[ ${prev} == "--recode-video" ]]; then
                _arguments '*: :(mp4 flv ogg webm mkv)'
            else
                _arguments '*: :({{flags}})'
            fi
        ;;
    esac
}

__youtube_dl