v1.2.0-beta/add youtube support

public/manifest.json

@@ -1,7 +1,7 @@
 {
   "name": "Watch Party",
   "short_name": "WP",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "description": "Watch streamed content together.",
   "background": {
     "page": "popup.html"
@@ -10,7 +10,8 @@
     "https://*.hulu.com/*",
     "https://*.netflix.com/*",
     "https://*.amazon.com/*",
-    "https://*.disneyplus.com/*"
+    "https://*.disneyplus.com/*",
+    "https://*.youtube.com/*"
   ],
   "content_security_policy": "script-src 'self' https://www.gstatic.com/ https://*.firebaseio.com https://www.googleapis.com; object-src 'self'",
   "content_scripts": [
@@ -37,6 +38,12 @@
       "run_at": "document_idle",
       "js": ["/static/js/content.js"],
       "css": ["/static/css/app.css"]
+    },
+    {
+      "matches": ["https://*.youtube.com/*"],
+      "run_at": "document_idle",
+      "js": ["/static/js/content.js"],
+      "css": ["/static/css/app.css"]
     }
   ],
   "web_accessible_resources": ["android-icon-192x192.png"],