add urlhelper to extract youtube video id from url

classes/urlhelper.php

@@ -487,4 +487,26 @@ class UrlHelper {
 		}
 	}
 
+	public static function url_to_youtube_vid($url) {
+		$url = str_replace("youtube.com", "youtube-nocookie.com", $url);
+
+		$regexps = [
+			"/\/\/www\.youtube-nocookie\.com\/v\/([\w-]+)/",
+			"/\/\/www\.youtube-nocookie\.com\/embed\/([\w-]+)/",
+			"/\/\/www\.youtube-nocookie\.com\/watch?v=([\w-]+)/",
+			"/\/\/youtu.be\/([\w-]+)/",
+		];
+
+		foreach ($regexps as $re) {
+			$matches = [];
+
+			if (preg_match($re, $url, $matches)) {
+				return $matches[1];
+			}
+		}
+
+		return false;
+	}
+
+
 }

plugins/af_youtube_embed/init.php

@@ -16,18 +16,16 @@ class Af_Youtube_Embed extends Plugin {
 	}
 
 	function hook_iframe_whitelisted($src) {
-		return in_array($src, ["www.youtube.com", "youtube.com", "youtu.be"]);
+		return in_array($src, ["www.youtube.com", "youtube.com",
+			"www.youtube-nocookie.com", "youtube-nocookie.com",
+			"youtu.be"]);
 	}
 
 	function hook_render_enclosure($entry, $hide_images) {
 
-		$matches = array();
+		$url = $entry["content_url"];
 
-		if (preg_match("/\/\/www\.youtube\.com\/v\/([\w-]+)/", $entry["content_url"], $matches) ||
+		if ($vid_id = UrlHelper::url_to_youtube_vid($url)) {
-			preg_match("/\/\/www\.youtube\.com\/watch?v=([\w-]+)/", $entry["content_url"], $matches) ||
-			preg_match("/\/\/youtu.be\/([\w-]+)/", $entry["content_url"], $matches)) {
-
-			$vid_id = $matches[1];
 
 			return "<div class='embed-responsive'>
 				<iframe class='youtube-player'