Fix video embed streaming, permission inheritance in create dialogs, and default to Guest browsing

Frontend/src/App.jsx

@@ -84,7 +84,10 @@ export default function App() {
           SetCurrentUser(User);
           SetAuthState("LoggedIn");
         })
-        .catch(() => SetAuthState("LoggedOut"));
+        .catch(() => {
+          SetCurrentUser(GuestUser);
+          SetAuthState("Guest");
+        });
     });
   }, []);