ATTI mode is something that makes a lot folks very nervous, and one reason for this is the fact that most folks experience it for the first time due to GPS signal loss, or as a result of compass errors, and when this occurs, it catches them greatly by surprise. As such, it is a mode that should be selected and practiced each flying session, if only for a little bit.
When you are comfortable with ATTI mode, it certainly can be used to capture smooth video as the copter 'coasts' with the wind, or simply 'coasts' in the direction that you last sent it. In these cases, all you have to think about controlling are the copter's Yaw and camera tilt.
I do mostly still photos with my old P4 (original) now, but one interesting effect is to fly the copter sideways directly into a stiff headwind (of maybe 15-20 kts), and then come off the controls and let it glide slowly to a stop followed by it smoothly transitioning to the opposite direction due to the wind. It's a subtle effect, and it always looks better using ATTI versus P or S modes, but you have to be comfortable with it for sure.