get_youtube_video_url.php

<?php

function get_youtube_video_url( $youtube_id )
{
	$data = trim(urldecode(file_get_contents('https://youtube.com/get_video_info?video_id=' . $youtube_id)));
	$d = parse_str($data, $info);
	
	$stream_map = trim($info['url_encoded_fmt_stream_map']);
	
	if( !$stream_map ) return false;
	
	if( substr( $stream_map, 0, 4 ) != "url=" )
	{
		return get_youtube_video_url( $youtube_id );
	}
	else
	{
		return substr( $stream_map, 4 );
	}
}

// CREATE A PHP PAGE LIKE video.php FOR EXAMPLE
// THEN GO TO VIDEO video.php?v=ndk6yxO97k4
header("Location: " . get_youtube_video_url( $_GET['v'] ) );
die;
?>