diff --git a/src/ext/conf/ExtConfPatches.js b/src/ext/conf/ExtConfPatches.js
index a9d4701..d6b87f3 100644
--- a/src/ext/conf/ExtConfPatches.js
+++ b/src/ext/conf/ExtConfPatches.js
@@ -2,6 +2,43 @@
 // version: {ExtensionConf object, but only properties that get overwritten}
 
 const ExtensionConfPatch = {
+  '4.2.1': {
+    sites: {
+      "old.reddit.com" : {
+        type: 'testing',
+        DOM: {
+          player: {
+            manual: true,
+            useRelativeAncestor: false,
+            querySelectors: '.media-preview-content'
+          }
+        },
+        css: '',
+      },
+      "www.reddit.com" : {
+        type: 'testing',
+        DOM: {
+          player: {
+            manual: true,
+            useRelativeAncestor: false,
+            querySelectors: '.media-preview-content'
+          }
+        },
+        css: '',
+      },
+      "www.youtube.com" : {
+        DOM: {
+          player: {
+            manual: true,
+            querySelectors: "#movie_player, #player",
+            additionalCss: "",
+            useRelativeAncestor: false,
+            playerNodeCss: "",
+          }
+        }
+      },
+    }
+  },
   '4.2.0': {
     sites: {
       "old.reddit.com" : {