Download at best quality

youtube_dl.sh

#!/bin/bash

if test "$1" = "video"; then
    youtube-dl --merge-output-format mkv -o './%(upload_date)s_%(title)s.%(ext)s' $2
elif test "$1" = "music"; then
    youtube-dl -f bestaudio -x --audio-format mp3 --audio-quality 0 -o './%(upload_date)s_%(title)s.%(ext)s' $2
elif test "$1" = "playlist-video"; then
    youtube-dl --merge-output-format mkv -o './%(playlist_index)s_%(title)s.%(ext)s' $2
elif test "$1" = "playlist-music"; then
    youtube-dl -f bestaudio -x --audio-format mp3 --audio-quality 0 -o './%(playlist_index)s_%(title)s.%(ext)s' $2
elif test "$1" = "formats"; then
    youtube-dl --list-formats $2
elif test ${#1} -gt 25; then
    youtube-dl --merge-output-format mkv -o './%(upload_date)s_%(title)s.%(ext)s' $1
else
    cat ./dl.sh
fi