diff --git a/index.js b/index.js
index 5210d91..3f05b22 100644
--- a/index.js
+++ b/index.js
@@ -31,9 +31,10 @@ http
     while ((match = pattern.exec(html)) !== null) {
       if (match.length > 0) {
         const playUrl = match[1];
-        const decodedUrl = unicodeToChar(playUrl);
-
-        urls.push(decodedUrl);
+        if (playUrl.match(/sdi4|sdi5|sdi6/)) {
+          const decodedUrl = unicodeToChar(playUrl);
+          urls.push(decodedUrl);
+        }
       }
     }