fix: add --video to manage_index examples, spot-verification parallel loop

references/spot-verification-workflow.md

@@ -20,6 +20,16 @@ When verifying ASR transcript claims against actual video visuals, use this ligh
 
    **Important:** Save frames to the video file's directory, never to `/tmp/` or other temporary paths.
 
+   **Parallel extraction:** Use a sequential `for` loop to extract multiple frames in one terminal call — each frame takes <1s so the total is still fast. Do not use shell `&` backgrounding inside a single terminal call; some terminal tools reject it.
+
+   ```bash
+   for ts in "00:05:17" "00:14:06" "00:28:00"; do
+     fn="$DIR/spot_${ts//:/}.jpg"
+     ffmpeg -hide_banner -y -ss "$ts" -i "$VIDEO" -frames:v 1 -q:v 3 "$fn" 2>/dev/null
+     echo "$ts -> $fn ($(stat -c%s "$fn" 2>/dev/null) bytes)"
+   done
+   ```
+
 2. **Send frames to vision analysis with targeted questions.** For each frame, ask about the specific transcript claim:
    - "The transcript says 'X' at this time. Can you see X happening?"
    - "Is there a boss/enemy visible? Is combat happening?"