downloading videos from youtube via online java websites

#!/bin/sh
while true
do
	echo 'enter URL (q to quit):'
	read   downloadlink
	if [ "$downloadlink" = "q" ]
	then
		echo quitting
		exit
	fi
	#echo you entered \'"$downloadlink"\'
	prefix=$(echo $downloadlink | sed 's/.*Episode%20\([0-9]\+\)%20.*/\1/')
	echo I guess file name prefix is "$prefix"
	echo we are giving command wget -b \'"$downloadlink"\' -O  "$prefix".flv -o  "$prefix".log
	echo if you agree press y else give other name 
	read yes_new
	if [ "$yes_new" = "y" ]
	then
		echo continuing
	else
		echo plan changed
		prefix="$yes_new"
	fi
# now we will give command 
	wget -b "$downloadlink" -O  "$prefix".flv -o  "$prefix".log
done