u/nibshittin

My kitchen sink makes the sound at 35 seconds if you flush a toilet while the tub is draining. Or if you have a bathroom sink filled, pull the drain plug and flush a toilet. Kitchen sink makes sound. In the video the tub is ran for 15-20 seconds without the drain stopped. At 30 seconds the toilet is flushed. At 35 the kitchen sink gurgles. It does not do this if just flushing a toilet or draining a tub or sink. What might cause this? It's done it as long as I can remember.