diff --git a/convert-psp b/convert-psp
index 87ac5b9..5fbaa16 100644
--- a/convert-psp
+++ b/convert-psp
@@ -1,18 +1,32 @@
 #!/bin/bash
 
-saveifs=$IFS
-IFS=$'\n'
-directory=$1
-files=($(ls "$1"))
-
 f_convert-psp(){
 	ffmpeg -y -i "$1" -flags +bitexact -vcodec libx264 -profile:v baseline -level 3.0 -s 480x272 -r 29.97 -b:v 384k -acodec aac -b:a 96k -ar 48000 -f psp -strict -2 "PSP/$1"
 }
 
+help(){
+	printf "Usage: $0 \"directory\" \"URL\"\n"
+	exit 1
+}
+
+[ -z "$1" ] && help
+[ "$1" == "-h" ] && help
+[ "$1" == "--help" ] && help
+
+saveifs=$IFS
+IFS=$'\n'
+directory=$1
+
+[ ! -d "$directory" ] && mkdir -p "$directory"
 [ ! -d "PSP/$directory" ] && mkdir -p "PSP/$directory"
 
-for file in ${files[@]}
+youtube-dl "$2" -f 18 -o "$directory/%(title)s.%(ext)s"
+
+files=($(ls "$directory"))
+
+for file in ${files[*]}
 do
+	[ ! -f "PSP/$directory/$file" ] && \
 	f_convert-psp "$directory"/"$file"
 done