He was just demonstrating what gestalt therapy looks like- it can be confrontational in nature depending on the T. He's not necessarily showing positive or negative outcomes, just what this therapy looks like in practice. I think these videos are great for illustrative purposes, which is very helpful for a psych student learning about the different therapeutic orientations. I wouldn't use them as a basis for judging a particular type of therapy however. A different T using Rogers' style could be terrible. Or, a T with a different personal style than Perls could be very effective using the Gestalt approach.