A sudden change in light will spook most fish, but they should get used to it. Before my clowns got used to my light settings and schedule they would freak out every time the lights went out. Now they start moving to the corner of the aquarium that they host when the lights start to dim. They might have started to breathe rapidly because the sudden change in light scared them but this should be temporary and as their eyes adjust to the new light. But based on the videos I think they have already adjusted to it pretty well, so nothing to worry about!