Video downloader using ffmpeg

#!/usr/bin/zsh

# User will provide URL to download the video

setopt BASH_REMATCH

YOUTUBE_REGEX="https\:\/\/www\.youtube\.com\/watch\?v=[0-9A-Za-z_-]{11}"
YTSHORT_REGEX="https\:\/\/youtu\.be/([0-9A-Za-z_-]{11})"
TSHORTS_REGEX="https\:\/\/www\.youtube\.com\/shorts/([0-9A-Za-z_-]{11})"
TWITTER_REGEX="https\:\/\/(www.)?twitter\.com"
REDDIT_REGEX="https\:\/\/(old\.|m\.|www\.)?reddit.com"

YOUTUBE_MEDIA_LIST="you.out"

_URL=""
_OUTPUT_FILE="%(title)s-%(uploader)s.mp4"

function print_help(){
    usage="This program downloads YouTube video. You can select quality of your liking
        -h --help           print this message
        -u --url            YouTube url of the video
        -o --output-file    the name of output file
        "
    echo $usage
}

opts=$(getopt -o hu:o: --long help --long url: --long output-file: -- "$@")

if [ $? -ne 0 ]; then
    echo "Incorrect options provided"
    exit 1
fi

eval set __ "$opts"

while true; do
    case "$1" in
        -h|--help)
            print_help
            exit 0
            ;;
        -u|--url)
            shift;
            _URL="$1"
            ;;
        -o|--output-file)
            shift;
            _OUTPUT_FILE="$1"
            ;;
        --)
            shift;
            break
            ;;
    esac
    shift
done

if [[ $_URL =~ $TSHORTS_REGEX ]]; then
    vid_code="${BASH_REMATCH[2]}"
    _URL="https://www.youtube.com/watch?v=${vid_code}"
elif [[ $_URL =~ $YTSHORT_REGEX ]]; then
    vid_code="${BASH_REMATCH[2]}"
    _URL="https://www.youtube.com/watch?v=${vid_code}"
fi

yt-dlp  -F "$_URL">$YOUTUBE_MEDIA_LIST

more $YOUTUBE_MEDIA_LIST|awk '!/^(\[youtube\]|\[info\]|sb[0-9])/'

declare -A fmt_list
more $YOUTUBE_MEDIA_LIST|awk '!/^(\[youtube\]|\[info\]|sb[0-9])/'| awk '/^([0-9]+|hls|dash|fall)/{print $1,$2}'|while read cd fmt;do fmt_list[$cd]=$fmt ; done
keys=( ${(k)fmt_list} )
c=""
f=""
FORMATS=""
iput="no"
while [ $iput = "no" ] ;
 do
    vared -p 'Select your video+audio (134+139) stream. Press ENTER for default values : ' -c FORMATS

    if [[ -z "$FORMATS" ]]; then
        echo "Default values (134+139) selected"
        FORMATS="134+139"
    fi

    code_fmt=( ${(@s/+/)FORMATS} )
    c=$code_fmt[1]
    f=$code_fmt[2]

    nc=$keys[(Ie)$c]
    nf=$keys[(Ie)$f]

    # echo "FORMATS : ${FORMATS}"
    # echo "code_fmt: ${code_fmt}"
    # echo "c = $c, nc = $nc"
    # echo "f = $f, nf = $nf"


    if [[ -n "$c" && -z "$f"  && $nc -gt 0 ]]; then
        iput="yes"
    elif [[ -n "$c" && -n "$f" && $nc -gt 0 && $nf -gt 0 ]]; then
        iput="yes"
    else
        echo "ERROR: Please provide correct codes"
    fi

done

echo "FORMATS : $FORMATS"


#yt-dlp -f "${FORMATS}" --add-metadata --embed-thumbnail --recode-video mp4 --prefer-ffmpeg --audio-format aac "${_URL}" -o "${_OUTPUT_FILE}"
yt-dlp -f "${FORMATS}" --add-metadata --embed-thumbnail --recode-video mp4 --prefer-ffmpeg --audio-format aac "${_URL}" -o "${_OUTPUT_FILE}"
rm $YOUTUBE_MEDIA_LIST