added protection agains deletion

app/views/video_views.py

@@ -63,6 +63,9 @@ def show_video_row(
                 (st.rerun if hasattr(st, "rerun") else st.experimental_rerun)()
         with c3:
             if st.button("🗑️", key=f"del_{video.file_name}"):
+                if preselected_labels and len(preselected_labels) > 0:
+                    st.warning("Vidéo labelisée.")
+                else:
                     st.session_state[play_key] = False
                     if os.path.exists(video.raw_file ):
                         os.remove(video.raw_file)