Vilas, you’re our resident expert on the 320, but I’m going to have to disagree with your automation philosophy today. Not all traffic will be displayed on TCAS. As such the AP/FD TCAS option will not always work. A few years ago, a crew had to ignore a TCAS RA, in order to prevent a collision.
The video was made when the only Airbus the airline operated was the A300. The general philosophy is still relevant today though. When immediate action is needed, turn off the AP. Even on the planes with AP/FD TCAS my airline’s RA procedure is still click click.