Add additional test case

Author: samwarnick

test/youtube.test.ts

@@ -17,6 +17,11 @@ test.each([
     settings: { replaceYouTubeLinks: true },
     expected: false,
   },
+  {
+    link: "https://www.youtube.com/watch?v=xxxxxxxxxxx",
+    settings: { replaceYouTubeLinks: false },
+    expected: false,
+  },
   {
     link: "https://www.youtube.com/watch?v=xxxxxxxxxxx",
     settings: { replaceYouTubeLinks: true },