Trim to 10s for faster processing (~20 encoder chunks instead of 30)

app.py

@@ -318,7 +318,7 @@ def generate_insights(engagement, region_activations, hrf_offset=5):
     return insights
 
 
-MAX_DURATION = 15  # Analyze first 15s — captures the hook, which is the most critical part
+MAX_DURATION = 10  # Analyze first 10s — captures hook + first message beat
 
 
 def trim_video(input_path: str, max_seconds: int = MAX_DURATION) -> str: