diff --git a/README.md b/README.md
index 4a4695c..26a1480 100644
--- a/README.md
+++ b/README.md
@@ -2,15 +2,15 @@
 
 **Authors:** Tomas Horsky, Haeri Kim
 
-**Student IDs:** 20256426, <ID>
+**Student IDs:** 20256426, 20254236
 
-**Emails:** tomashorsky@kaist.ac.kr , <Email> 
+**Emails:** tomashorsky@kaist.ac.kr , kimhaeri@kaist.ac.kr
 
 **Live website:** <https://map-jurnal.web.app/>
 
 **Repository:** <https://git.prototyping.id/20256426/Map-Jurnal.git>
 
-**Video Demo:** _[YouTube URL]_
+**Video Demo:** https://youtu.be/j8-Ue4wanRU
 
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@@ -36,14 +36,8 @@ Journi is a web application for journaling and visualizing travel experiences. U
 
 ## Backend — Firebase
 
-![Database diagram](/DB-diagram.PNG)
-
-| Service | Purpose |
-|---------|---------|
-| **Authentication** | Google account sign-in via `GoogleAuthProvider` |
-| **Firestore** | Stores user profiles (`users/{uid}`) and journal entries (`users/{uid}/entries/{id}`) |
-| **Storage** | Stores uploaded trip photos, accessed per user |
-| **Security rules** | Simple per-user access — only authenticated users can read/write their own data |
+![Firestore diagram](public/DB-diagram.PNG)
+Journi uses Firebase as its backend. Users sign in with Google through Firebase Authentication, and their data is linked to their user ID. Firestore stores user profiles in `users/{uid}` and journal entries in `users/{uid}/entries/{id}`. Firebase Storage stores uploaded trip photos. Firebase Security Rules protect the data, so authenticated users can only read and write their own profiles, entries, and photos.
 
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