Review 10–15 seconds in the app where the result will actually be shown. Check frame drops, delay, crop, and the face outline at normal size. If it fails, adjust light or framing before changing the reference image.
A convincing face-swap preview has to survive motion, occlusion, and ordinary lighting—not just one flattering still frame. Use this checklist before recording or joining a call. Work only with a reference photo you are authorized to use, keep the camera fixed, and change one condition at a time.
For a browser-based comparison, try the live swap face preview with the same reference image and repeat the short movements below. I am connected with this tool, so the checklist focuses on checks you can make yourself rather than a claim that any result is guaranteed.
Record a short sample if your workflow permits it. Review the face outline, eyes, mouth, hairline, and recovery after a hand crosses the face. If the output will be shown to others, disclose that the image has been altered.