Texas Chicken is too close, but in the hands of professional’s who do it a dozen times a day is no big deal. Texas Chicken on the open ocean with people who have maybe done it in a simulator once is “too close.” Any universally acceptable CPA (i.e 1 nm) shouldn’t have any real effect on the movement of either vessel. Even at 0.5nm. Any closer than that…too close.
Plus that YouTube clip is showing shallow water and a narrow channel, where the interaction effect is much greater. Deep, ocean sea passages shouldn’t have nearly the same effect.