add speedup error

app.py

@@ -301,7 +301,7 @@ with st.form("my_form"):
             st.video(url)
             strike(url, speedup_factor, min_speedup, max_speedup, max_num_segments)
     else:
-        st.write("speedup must be between min and max")
+        st.error("speedup must be between min and max")
 
 st.markdown(
     """