Update app.py

app.py

@@ -23,6 +23,6 @@ with gr.Blocks() as demo:
     custom_name = gr.Textbox(label="custom_name")
     output = gr.Audio(label="output")
     download_youtube_wav_btn = gr.Button("Greet")
-    download_youtube_wav_btn.click(fn=download_youtube_wav, inputs=url custom_name, outputs=output)
+    download_youtube_wav_btn.click(fn=download_youtube_wav, inputs=url, custom_name, outputs=output)
 
 demo.launch()