#!/bin/bash

if [ $# -ne 1 ]
then
	>&2 echo "Usage: $0 <url>"
	exit 1
fi

if [ "$1" = "-h" ]
then
	echo "Usage: $0 <url>"
	exit 0
fi

URL="$1"
YT_URL="${URL//https:\/\/*\//https:\/\/www.youtube.com\/}"
echo "$YT_URL"