"With video frame" uses screen capture: when your browser asks, choose This tab. If it isn't available, the drawing is saved on its own (transparent PNG). Saved images go to the Snapshot collection.
Save this drawing
Drawn at 0:00. Pick the mark it belongs to (or add a new one).
When the video plays, the drawing shows for 5 s from that mark, then clears.
Test settings
The timing window is how many seconds either side counts as spotting a moment, and how long a saved drawing stays on screen. Changes apply straight away.
Video setup
Start atm:ss, saved for this video
Export
Includes scored results once you press Finish & score. Ticked snapshots are included in the PDF, PowerPoint and Word files, and get a thumbnail in the CSV.