trying another approach...

app.py

@@ -74,12 +74,10 @@ def generate_interpolation(text, fps=10):
 demo = gr.Blocks()
 
 with demo:
-  text = gr.Textbox(placeholder='human, human head, brain, brain in a computer, humanoid robot', label='Input a comma-separated list of terms')
-  #button_gen_video = gr.Button("Generate Video")
-  #output_interpolation = gr.Video(label="Generated Video")
-  #button_gen_video.click(fn=generate_interpolation, inputs=text, outputs=output_interpolation)
-  button = gr.Button('display text')
-  output = gr.Text()
-  button.click(fn=lambda x: x, inputs=text, outputs=text)
+  text = gr.Textbox(placeholder='human, human head, brain, brain in a computer, humanoid robot', label='Input a comma-separated list of terms:')
+  button = gr.Button("Generate Video")
+  output = gr.Video(label="Generated Video")
+        
+  button.click(fn=generate_interpolation, inputs=text, outputs='out.mp4')  
 
 demo.launch(debug=True, enable_queue=True)