af_redditimgur: fix for gfycat

plugins/af_redditimgur/init.php

@@ -95,7 +95,7 @@ class Af_RedditImgur extends Plugin {
 						if ($tmpdoc) {
 							$tmpxpath = new DOMXPath($tmpdoc);
 
-							$source_meta = $tmpxpath->query("//meta[@property='og:video']")->item(0);
+							$source_meta = $tmpxpath->query("//meta[@name='twitter:player:stream' and contains(@content, '.mp4')]")->item(0);
 							$poster_meta = $tmpxpath->query("//meta[@property='og:image' and contains(@content,'thumbs.gfycat.com')]")->item(0);
 
 							if ($source_meta) {