update func extract_video_id

src/streamlit_app.py

@@ -31,7 +31,7 @@ except ImportError as e:
     st.stop()
 
 
-def extract_video_id(url_or_id: str) -> str | None:
+def extract_video_id(url_or_id: str):
     """
     Tries to get the YouTube video ID from different common URL types.
     Also handles if the input is just the ID itself.