The cause of the fireworks seen in this Hubble image and video is hidden behind a dense disc and envelope of dust. However, astronomers think that the strobe effect is due to periodic interactions between two newly-formed stars that are gravitationally bound to each other.
These two stars drag material inwards from a surrounding disc of gas and dust. Astronomers propose that the light flashes seen in this video are due to this material suddenly being dumped onto the growing stars as they near one another in their orbits, unleashing a blast of radiation.