getfbvideo.php

<?php 
/* Share on httzip.com
*/
ini_set('display_errors', 'Off');

function get_web_page($url) {
	$options = array(
		CURLOPT_RETURNTRANSFER => true,   
		CURLOPT_HEADER         => false, 
		CURLOPT_FOLLOWLOCATION => true,   
		CURLOPT_MAXREDIRS      => 10,
		CURLOPT_USERAGENT      => "facebookexternalhit/1.1 (+https://www.facebook.com/externalhit_uatext.php)", // Do not Remove this line
		CURLOPT_AUTOREFERER    => true,   
		CURLOPT_CONNECTTIMEOUT => 120,    
		CURLOPT_TIMEOUT        => 120,    
	); 
	$ch = curl_init($url);
	curl_setopt_array($ch, $options);
	$content = curl_exec($ch);
	curl_close($ch);

	$findHD = preg_match_all('/hd_src:"([^"]*)"/', $content, $hd);
	$findSD = preg_match_all('/sd_src:"([^"]*)"/', $content, $sd);

	$findAudio = preg_match_all('/,audio:\[(.*?)\]/sm', $content, $audio,PREG_SET_ORDER, 0);

    /*Extract Audio*/
	$audioString = str_replace(",audio:","",$audio[0][0]);
	$audioFirstUrl = preg_match('/{url:"(.*?)\",/',$audioString,$audio,PREG_OFFSET_CAPTURE, 0);
    /*End Extract Audio*/

	 $findThumbnail        = preg_match_all('/"thumbnailUrl":"([^"]*)"/', $content, $thumbnail);
        $findTitle            = preg_match_all('/<meta property="og:title" content="([^"]*)"/', $content, $title);
        $findPageName         = preg_match_all('/<title id="pageTitle">([^"]*)<\/title>/', $content, $pageName);
        $findVideoDescription = preg_match_all('/<div data-testid="post_message" class="_5pbx userContent _3576" data-ft="&#123;&quot;tn&quot;:&quot;K&quot;&#125;"><p>(.*)<\/p><\/div>/s', $content, $videoDescription);

        $hd          = !empty($hd[1][0]) ? $hd[1][0] : null;
        $sd          = !empty($sd[1][0]) ? $sd[1][0] : null;
        $audio       = !empty($audio[1][0]) ? $audio[1][0] : null;
        $thumbnail   = !empty($thumbnail[1][0]) ? str_replace("\\","",$thumbnail[1][0]) : null;
        $description = !empty($videoDescription[1][0]) ? strip_tags($videoDescription[1][0]) : null;
        $title       = !empty($title[1][0]) ? $title[1][0] : null;
        $pageName    = !empty($pageName[1][0]) ? explode("-", $pageName[1][0]) : null;


        // Output
        $oData = [
            "hd_src"    => $hd,
            "sd_src"    => $sd,
            "audio_src" => $audio,
            "thumbnail" => $thumbnail,
            "desc"      => $description,
            "title"     => $title,
            "page_name" => !empty($pageName[0]) ? $pageName[0] : ""
        ];
    return json_encode($oData);

}
echo ( get_web_page("https://www.facebook.com/vtvchatluongcuocsong/videos/1771875049651792"));  // Change your facebook video url

?>