Update app.py

Reintroduce the concurrency limitation.

app.py

@@ -771,7 +771,7 @@ with gr.Blocks(theme=gr.themes.Soft()) as iface:
             *txt2vid_advanced,
         ],
         outputs=txt2vid_output,
-        concurrency_limit=None,
+        concurrency_limit=1,
         concurrency_id="generate_video",
     )
 
@@ -789,9 +789,9 @@ with gr.Blocks(theme=gr.themes.Soft()) as iface:
             *img2vid_advanced,
         ],
         outputs=img2vid_output,
-        concurrency_limit=None,
+        concurrency_limit=1,
         concurrency_id="generate_video",
     )
 
 if __name__ == "__main__":
-    iface.launch(share=True, show_api=False)
+    iface.queue(max_size=64, default_concurrency_limit=1, api_open=False).launch(share=True, show_api=False)