add a royality-free example video

app.py

@@ -283,6 +283,16 @@ with gr.Blocks() as demo:
     
     with gr.Tab("Load Video & Define Alert Zone"):
         video_input = gr.Video(label="Upload Video", format="mp4")
+
+        with gr.Row():
+            gr.Examples(
+                examples=[
+                    ["examples/faint.mp4"]
+                ],
+                inputs=[video_input],
+                label="Try Example Video"
+            )
+
         load_frame_btn = gr.Button("Load First Frame to Editor")
         frame_editor = gr.ImageEditor(label="Draw Alert Zone on this frame (use red brush)", type="numpy",)
         preview_button = gr.Button("Preview Alert Zone")