[YouTube rss api v2 to v3 convertion?]

Hello I'm not really an expert on the subject and i was wondering if somebody will help me to make this codes work on YouTube API v3?

<?php
header('Content-Type: text/html; charset=utf-8');
$channel_id=$_GET['id'];
$search_word=$_GET['search_word'];
$search_word=str_replace(' ','+',$search_word);
//echo'<br>$search_word : '.$search_word.'<br>';
$feedUrl='http://gdata.youtube.com/feeds/api/videos?q='.$search_word.'&orderby=published&start-index=1&max-results=20&v=2&alt=json&author='.$channel_id;
//echo'<br>$feedUrl : '.$feedUrl.'<br>';
$contents=file_get_contents($feedUrl);
//echo'<br>$contents : '.$contents.'<br>';

$data = json_decode($contents,true);

//echo'<br>$data : '.$data.'<br>';

$info = $data["feed"];
$entry = $info["entry"];
$nEntry = count($entry); 
$PLayListVideos=array();
//echo'<br>$nEntry : '.$nEntry.'<br>';
for($i=0;$i<$nEntry;$i++){
		$video = array(	            
						'title' => $entry[$i]['title']['$t'],
						'description' => $entry[$i]['media$group']['media$description']['$t'],							
						'published' =>$entry[$i]['published']['$t'],
						'duration'=>$entry[$i]['media$group']['yt$duration']['seconds'], 
						'videoid'=>$entry[$i]['media$group']['yt$videoid']['$t'],
						'favoriteCount'=>$entry[$i]['yt$statistics']['favoriteCount'],
						'viewCount'=>$entry[$i]['yt$statistics']['viewCount'],
						'numDislikes'=>$entry[$i]['yt$rating']['numDislikes'],
						'numLikes'=>$entry[$i]['yt$rating']['numLikes'],
						'rating'=>$entry[$i]['gd$rating']['average'],
						'max'=>$entry[$i]['gd$rating']['max'],
						'min'=>$entry[$i]['gd$rating']['min'] ,
						'numRaters'=>$entry[$i]['gd$rating']['numRaters'] ,
						'rtsp1'=>$entry[$i]['media$group']['media$content']['1']['url'],
						'rtsp2'=>$entry[$i]['media$group']['media$content']['2']['url'],
					);
						array_push($PLayListVideos,$video);
				}
			
					echo json_encode($PLayListVideos);

?>

and this one too

<?php
header('Content-Type: text/html; charset=utf-8');
	$feedUrl='https://gdata.youtube.com/feeds/api/users/'.$_GET['id'].'/playlists?v=2&alt=json&start-index=1&max-results=50'; 
	$data = json_decode(file_get_contents($feedUrl),true);
	$info = $data["feed"];
	$entry = $info["entry"];
	$nEntry = count($entry);
/*	echo "Playlist Name: ".$info["title"]['$t'].'<br/>';
	echo "Number of Videos (".$nVideo."):<br/>";*/
	$MainFeed=array();
	for($i=0;$i<$nEntry;$i++){
		$thumbId=split('/',$entry[$i]['media$group']['media$thumbnail'][0]['url'] );
		$thumbId=$thumbId[4];		
		$playList=array(	            
						'title' => $entry[$i]['title']['$t'],
						'playlistId' => $entry[$i]['yt$playlistId']['$t'],
						'published'=>$entry[$i]['published']['$t'], 
						'thumbId'=>$thumbId,
						'videosCount'=>$entry[$i]['yt$countHint']['$t'],
						'videos'=>getVideos($entry[$i]['yt$playlistId']['$t'])						
					);
		array_push($MainFeed,$playList);
		//print_r($entry[$i]);
					/*
	    echo "Name: ".$entry[$i]['title']['$t'].'<br/>';
	    echo 'http://www.youtube.com/playlist?list='.$entry[$i]['yt$playlistId']['$t'].'&feature=plcp'.'<br/>';		
		echo '<br>$thumbId : '.$thumbId .'<br>';
		echo "playlistId:  ".$entry[$i]['yt$playlistId']['$t']."<br />";
		echo "published:  ".$entry[$i]['published']['$t']."<br />";
		*/ 
	//	break;
	}
	echo '{ "feed":'.json_encode($MainFeed).'}';
	
function getVideos($playListId){
	$feedUrl='https://gdata.youtube.com/feeds/api/playlists/'.$playListId.'?v=2&alt=json';  
	$data = json_decode(file_get_contents($feedUrl),true);
	$info = $data["feed"];
	$entry = $info["entry"];
	$nEntry = count($entry); 
 	$PLayListVideos=array();
	for($i=0;$i<$nEntry;$i++){
			$video = array(	            
							'title' => $entry[$i]['title']['$t'],
							'description' => $entry[$i]['media$group']['media$description']['$t'],							
							'published' =>$entry[$i]['published']['$t'],
							'duration'=>$entry[$i]['media$group']['yt$duration']['seconds'], 
							'videoid'=>$entry[$i]['media$group']['yt$videoid']['$t'],
							'favoriteCount'=>$entry[$i]['yt$statistics']['favoriteCount'],
							'viewCount'=>$entry[$i]['yt$statistics']['viewCount'],
							'numDislikes'=>$entry[$i]['yt$rating']['numDislikes'],
							'numLikes'=>$entry[$i]['yt$rating']['numLikes'],
							'rating'=>$entry[$i]['gd$rating']['average'],
							'max'=>$entry[$i]['gd$rating']['max'],
							'min'=>$entry[$i]['gd$rating']['min'] ,
							'numRaters'=>$entry[$i]['gd$rating']['numRaters'] ,
							'rtsp1'=>$entry[$i]['media$group']['media$content']['1']['url'],
							'rtsp2'=>$entry[$i]['media$group']['media$content']['2']['url'],
						);
		array_push($PLayListVideos,$video);
						/*
	    echo "Name: ".$entry[$i]['title']['$t'].'<br/>';
		echo "published:  ".$entry[$i]['published']['$t']."<br />";
		echo "duration : ".$entry[$i]['media$group']['yt$duration']['seconds'].'<br/>';
		echo "videoid : ".$entry[$i]['media$group']['yt$videoid']['$t'].'<br/>';
	    echo "Image 90 : ".$entry[$i]['media$group']['media$thumbnail'][0]['url'].'<br/>';
		echo "Image 180 : ".$entry[$i]['media$group']['media$thumbnail'][1]['url'].'<br/>';
		echo "Image 360 : ".$entry[$i]['media$group']['media$thumbnail'][2]['url'].'<br/>';
		echo "favoriteCount : ".$entry[$i]['yt$statistics']['favoriteCount'] .'<br/>';
		echo "viewCount : ".$entry[$i]['yt$statistics']['viewCount'] .'<br/>';
		echo "numDislikes : ".$entry[$i]['yt$rating']['numDislikes'] .'<br/>';
		echo "numLikes : ".$entry[$i]['yt$rating']['numLikes'] .'<br/>';
		echo "rating : ".$entry[$i]['gd$rating']['average'] .'<br/>';
		echo "max : ".$entry[$i]['gd$rating']['max'] .'<br/>';
		echo "min : ".$entry[$i]['gd$rating']['min'] .'<br/>';
		echo "numRaters : ".$entry[$i]['gd$rating']['numRaters'] .'<br/>'; 
		
		echo "rtsp1 : ".$entry[$i]['media$group']['media$content']['1']['url'] .'<br/>'; 
		echo "rtsp2 : ".$entry[$i]['media$group']['media$content']['2']['url'] .'<br/>'; 
		*/
		//print_r($entry[$i]); 
	}
	return $PLayListVideos;
}
?>

They are for my android application which stopped working due to the deprecation of YouTube API v2.