It can indicate abnormal combustion or operation. Sound and appearance alone cannot establish the cause, and the owner should not adjust gas components.
What the observation means
The burner, fuel configuration and installation need the appropriate competence. A strong-looking flame is not evidence of better performance.
A useful next step
Stop using the affected appliance and describe the change. If there is a gas smell or immediate concern, follow emergency guidance. Do not alter air shutters, injectors or regulators to make the flame quieter, and do not keep running it for a clearer video.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.