Update streamlit_app.py

streamlit_app.py

@@ -31,14 +31,16 @@ except ImportError:  # pragma: no cover
 DATA_DIR = Path("./data")
 DATA_DIR.mkdir(exist_ok=True)
 
+# Use the newest Gemini model that consumes the fewest tokens
 MODEL_OPTIONS = [
+    "gemini-2.5-flash-lite",   # default, cheapest‑token version
     "gemini-2.5-flash",
-    "gemini-2.5-flash-lite",
-    "gemini-2.0-flash",
     "gemini-2.0-flash-lite",
+    "gemini-2.0-flash",
     "custom",
 ]
-DEFAULT_MODEL = "gemini-2.0-flash-lite"
+DEFAULT_MODEL = "gemini-2.5-flash-lite"
+
 DEFAULT_PROMPT = (
     "Watch the video and provide a detailed behavioral report focusing on human actions, "
     "interactions, posture, movement, and apparent intent. Keep language professional. "
@@ -235,6 +237,7 @@ def download_video(url: str, dst_dir: str, password: str = "") -> str:
     if not any(dst_dir.iterdir()):
         raise RuntimeError("yt‑dlp did not download any files.")
     newest = max(dst_dir.iterdir(), key=lambda p: p.stat().st_mtime)
+     # Return the newest file converted to MP4
     return convert_to_mp4(str(newest))
 
 
@@ -258,10 +261,14 @@ def main() -> None:
             )
         st.session_state["model_input"] = model
 
-        # API key – prefer Streamlit secrets, fall back to env / session state
-        secret_key = st.secrets.get("google_api_key")
+        # ----- Secret handling (no secrets.toml) -----
+        # If a secret file existed it would be read here, but we fall back
+        # to the environment variable or manual entry.
+        secret_key = os.getenv("GOOGLE_API_KEY", "")
         if secret_key:
             st.session_state["api_key"] = secret_key
+
+        # Allow manual entry (overwrites any env value)
         st.text_input("Google API Key", key="api_key", type="password")
 
         st.text_area(