small update

app.py

@@ -472,7 +472,7 @@ with gr.Blocks() as iface:
         """
     )
     with gr.Row():
-        query_input = gr.Textbox(label="Your Question", placeholder="e.g., What is a convolutional neural network?")
+        query_input = gr.Textbox(label="Your Question", placeholder="Using only the videos, explain how ResNets work.")
         submit_button = gr.Button("Ask & Find Video")
     with gr.Row():
         reasoning_output = gr.Markdown(label="LLM Reasoning")