Returns Screenshot from Vimeo and Youtube.

vimeo-youtube-screenshot.php

function video_image($url){
    if(preg_match('/youtu\.be/i', $url) || preg_match('/youtube\.com\/watch/i', $url)){
        preg_match('/^.*((youtu.be\/)|(v\/)|(\/u\/\w\/)|(embed\/)|(watch\?))\??v?=?([^#\&\?]*).*/', $url, $matches);
        return "http://img.youtube.com/vi/".$matches[7]."/0.jpg";;
    } else if(preg_match('/vimeo\.com/i', $url)){
        preg_match('/\/\/(www\.)?vimeo.com\/(\d+)($|\/)/', $url, $matches);
        $hash = unserialize(file_get_contents("http://vimeo.com/api/v2/video/".$matches[2].".php";));
        return $hash[0]["thumbnail_large"];
    }
}