make download condition more strict

app.py

@@ -27,7 +27,7 @@ with col1:
 with col2:
     st.video(url)
 
-if not os.path.exists(f"{video_id}"):
+if not os.path.exists(f"{video_id}/history.txt"):
     st.write("Video not found locally. Downloading may take several minutes. Continue?")
 
     click = st.button("Download")