YTDL

<?php
/* READ ME!
/* Required on file : wget, php5.6 - 7.1 [ cli ]
/* Created By 0xCor3 | Security Ghost
/* Thanks For Stackoverflow.com && Security Ghost */
function Grabmp3($id){
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, "http://saveitoffline.com/process/?url=https://www.youtube.com/watch?v=".$id."&type=json");
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)");
		$ex = curl_exec($ch);
		$gLink = json_decode($ex);
		$title = $gLink->title;
		$dl = $gLink->urls[19]->id;
		$hm = $title." | ".$dl;
		return($hm);

	}
function loadz($url){
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)");
		$ex = curl_exec($ch);
		curl_close($ch);
		return($ex);
	}
    $baseUrl = 'https://www.googleapis.com/youtube/v3/';
    // https://developers.google.com/youtube/v3/getting-started
    $apiKey = 'AIzaSyA5vOzQg5uXEjEz3eLiahKrIvTcFpc7G8A';
    // If you don't know the channel ID see below
    $channelId = 'UCfMcMOvgflhwW3FQtLosn7Q';

    $params = [
        'id'=> $channelId,
        'part'=> 'contentDetails',
        'key'=> $apiKey
    ];
    $url = $baseUrl . 'channels?' . http_build_query($params);
    $json = json_decode(loadz($url), true);

    $playlist = $json['items'][0]['contentDetails']['relatedPlaylists']['uploads'];

    $params = [
        'part'=> 'snippet',
        'playlistId' => $playlist,
        'maxResults'=> '50',
        'key'=> $apiKey
    ];
    $url = $baseUrl . 'playlistItems?' . http_build_query($params);
    $json = json_decode(loadz($url), true);

    $videos = [];
    foreach($json['items'] as $video)
        $videos[] = $video['snippet']['resourceId']['videoId'];

    while(isset($json['nextPageToken'])){
        $nextUrl = $url . '&pageToken=' . $json['nextPageToken'];
        $json = json_decode(loadz($nextUrl), true);
        foreach($json['items'] as $video)
            $videos[] = $video['snippet']['resourceId']['videoId'];
    }
    $z = 1;
    foreach ($videos as $linkid) {
    	$rem = explode("|",Grabmp3($linkid));
    	$l = $rem[1];
    	$t = $rem[0];
    	echo $z++."). ".$linkid." => ".$l."<br>";
    	system("wget --max-redirect 1 -c $l -O $t.m4a");
    }
?>