signature issue when I want to get a direct URL from YouTube via PHP

Question

after research to how i get direct URL from YouTube videos like this one asking : How to get direct URL of video from YouTube URL? [closed]

i finally made a simple script to generate a direct URL from YouTube video with php and it works just fine, but not with all videos

it doesn't work with "signature" videos,

this is my code:

if(isset($_GET['url']) && $_GET['url'] != ""){
    parse_str( parse_url( $_GET['url'], PHP_URL_QUERY ), $vars );


    $id=$vars['v'];
    $dt=file_get_contents("https://www.youtube.com/get_video_info?video_id=$id&el=embedded&ps=default&eurl=&gl=US&hl=en");
    //var_dump(explode("&",$dt));
    if (strpos($dt, 'status=fail') !== false) {

        $x=explode("&",$dt);
        $t=array(); $g=array(); $h=array();

        foreach($x as $r){
            $c=explode("=",$r);
            $n=$c[0]; $v=$c[1];
            $y=urldecode($v);
            $t[$n]=$v;
        }

            $x=explode("&",$dt);
            foreach($x as $r){
                $c=explode("=",$r);
                $n=$c[0]; $v=$c[1];
                $h[$n]=urldecode($v);
            }
            $g[]=$h;
            $g[0]['error'] = true;
            $g[0]['instagram'] = "egy.js";
            $g[0]['apiMadeBy'] = 'El-zahaby';
        echo json_encode($g,JSON_PRETTY_PRINT);

    }else{

        $x=explode("&",$dt);
        $t=array(); $g=array(); $h=array();

        foreach($x as $r){
            $c=explode("=",$r);
            $n=$c[0]; $v=$c[1];
            $y=urldecode($v);
            $t[$n]=$v;
        }
        $streams = explode(',',urldecode($t['url_encoded_fmt_stream_map']));
        foreach($streams as $dt){ 
            $x=explode("&",$dt);
            foreach($x as $r){
                $c=explode("=",$r);
                $n=$c[0]; $v=$c[1];
                $h[$n]=urldecode($v);
            }
            $g[]=$h;
        }
        echo json_encode($g,JSON_PRETTY_PRINT);
       // var_dump( $g[1]["quality"],true);
    }
}else{
    @$myObj->error = true;
    $myObj->msg = "there is no youtube link";

    $myObj->madeBy = "El-zahaby";
    $myObj->instagram = "egy.js";
    $myJSON = json_encode($myObj,JSON_PRETTY_PRINT);

    echo $myJSON;

}

example of issue : https://you-link.herokuapp.com/?url=yt.com?v=csy7cF1T2vk

update:

the code on : gist.github

any solution ? thanks a lot

Answer 1

This is my solution based on the latest Youtube Website Update (2019).

<?php
    function YT_IN_DX($url){
        $cookie_file_path = "cookies.txt";
        $agent = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:43.0) Gecko/20100101 Firefox/46.0";
        $ch = curl_init();
        $headers[] = "Connection: Keep-Alive";
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_HEADER, 1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_USERAGENT, $agent);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file_path); 
        curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file_path); 
        curl_setopt($ch, CURLOPT_URL, $url);
        $res = curl_exec($ch);
        curl_close($ch);
        return $res;
    }
    function YT_V_INFO($v){
        $url="https://www.youtube.com/watch?v=$v";
        $html=YT_IN_DX($url);
        $video_links=Explode_Content('ytplayer.config = ', ';ytplayer.load', $html);
        $jsondownload1=json_decode($video_links, true);
        $json_str=$jsondownload1["args"]["player_response"];
        $jsn_str=str_replace("\u0026","&",$json_str);
        $streamin_data_json=json_decode($jsn_str, true);
        $videolink=$streamin_data_json["streamingData"]["formats"][0]["url"];
        return $videolink;
    }

    function Explode_Content($first, $last, $string){
        $exp=explode($first,$string);
        $exp=explode($last,$exp[1]);
        return $exp[0];
    }

    // Include these functions at the top.
    // Get direct url from Youtube with two lines
    $videolink = YT_V_INFO("6chhghoMGVQ"); // Add Youtube Video ID
    echo $videolink; // Your download link
?>

For the video quality you can get only the low, for the medium or the HD quality you get the video separated AUDIO-LINK / VIDEO-LINK.