Update README demo video

Replace the cover-image link (Google Drive) with the GitHub-hosted demo
video so it plays inline, across all language READMEs. Add an
"illustrative simulated preview — not real trading performance" note
next to it in each locale.

README.md

@@ -63,15 +63,7 @@ Use the links below to open trading accounts for crypto and supported US stock,
 
 ## Quick demo
 
-<p align="center">
-  <a href="https://drive.google.com/file/d/1frzw-HDZ3viQvLOQKsAJGc9bT0dXs68D/view">
-    <img src="screenshots/demo-cover.png" alt="NOFX quick demo video" width="900"/>
-  </a>
-</p>
-
-<p align="center">
-  Click the cover image to watch the demo video.
-</p>
+https://github.com/user-attachments/assets/3310f495-14c5-4586-a1cc-3d32e44aa505
 
 ---
 

docs/i18n/ja/README.md

@@ -63,15 +63,7 @@ curl -fsSL https://raw.githubusercontent.com/NoFxAiOS/nofx/main/install.sh | bas
 
 ## クイックデモ
 
-<p align="center">
-  <a href="https://drive.google.com/file/d/1frzw-HDZ3viQvLOQKsAJGc9bT0dXs68D/view">
-    <img src="../../../screenshots/demo-cover.png" alt="NOFX quick demo video" width="900"/>
-  </a>
-</p>
-
-<p align="center">
-  カバー画像をクリックしてデモ動画をご覧ください。
-</p>
+https://github.com/user-attachments/assets/3310f495-14c5-4586-a1cc-3d32e44aa505
 
 ---
 

docs/i18n/ko/README.md

@@ -63,15 +63,7 @@ curl -fsSL https://raw.githubusercontent.com/NoFxAiOS/nofx/main/install.sh | bas
 
 ## 빠른 데모
 
-<p align="center">
-  <a href="https://drive.google.com/file/d/1frzw-HDZ3viQvLOQKsAJGc9bT0dXs68D/view">
-    <img src="../../../screenshots/demo-cover.png" alt="NOFX quick demo video" width="900"/>
-  </a>
-</p>
-
-<p align="center">
-  커버 이미지를 클릭해 데모 영상을 보세요.
-</p>
+https://github.com/user-attachments/assets/3310f495-14c5-4586-a1cc-3d32e44aa505
 
 ---
 

docs/i18n/ru/README.md

@@ -63,15 +63,7 @@ curl -fsSL https://raw.githubusercontent.com/NoFxAiOS/nofx/main/install.sh | bas
 
 ## Короткая демонстрация
 
-<p align="center">
-  <a href="https://drive.google.com/file/d/1frzw-HDZ3viQvLOQKsAJGc9bT0dXs68D/view">
-    <img src="../../../screenshots/demo-cover.png" alt="NOFX quick demo video" width="900"/>
-  </a>
-</p>
-
-<p align="center">
-  Нажмите на обложку, чтобы посмотреть демо.
-</p>
+https://github.com/user-attachments/assets/3310f495-14c5-4586-a1cc-3d32e44aa505
 
 ---
 

docs/i18n/uk/README.md

@@ -63,15 +63,7 @@ curl -fsSL https://raw.githubusercontent.com/NoFxAiOS/nofx/main/install.sh | bas
 
 ## Коротка демонстрація
 
-<p align="center">
-  <a href="https://drive.google.com/file/d/1frzw-HDZ3viQvLOQKsAJGc9bT0dXs68D/view">
-    <img src="../../../screenshots/demo-cover.png" alt="NOFX quick demo video" width="900"/>
-  </a>
-</p>
-
-<p align="center">
-  Натисніть на обкладинку, щоб переглянути демо.
-</p>
+https://github.com/user-attachments/assets/3310f495-14c5-4586-a1cc-3d32e44aa505
 
 ---
 

docs/i18n/vi/README.md

@@ -63,15 +63,7 @@ Sử dụng các liên kết bên dưới để mở tài khoản giao dịch ch
 
 ## Demo nhanh
 
-<p align="center">
-  <a href="https://drive.google.com/file/d/1frzw-HDZ3viQvLOQKsAJGc9bT0dXs68D/view">
-    <img src="../../../screenshots/demo-cover.png" alt="NOFX quick demo video" width="900"/>
-  </a>
-</p>
-
-<p align="center">
-  Nhấp vào ảnh bìa để xem video demo.
-</p>
+https://github.com/user-attachments/assets/3310f495-14c5-4586-a1cc-3d32e44aa505
 
 ---
 

docs/i18n/zh-CN/README.md

@@ -65,15 +65,7 @@ curl -fsSL https://raw.githubusercontent.com/NoFxAiOS/nofx/main/install.sh | bas
 
 ## 快速演示
 
-<p align="center">
-  <a href="https://drive.google.com/file/d/1frzw-HDZ3viQvLOQKsAJGc9bT0dXs68D/view">
-    <img src="../../../screenshots/demo-cover.png" alt="NOFX quick demo video" width="900"/>
-  </a>
-</p>
-
-<p align="center">
-  点击封面图观看演示视频。
-</p>
+https://github.com/user-attachments/assets/3310f495-14c5-4586-a1cc-3d32e44aa505
 
 ---