The Letter is up

[Aistaraina]

but what are we going to AA if we're not targetting a mob? i dont know, but im just going by how it is in ffxi. you can draw your weapon but unless u manually choose to attack the mob, you won't go into AA mode. just active mode

Except no engage button is visible anywhere in the video... or I'm blind. Leads me to believe whatever you have targeted, and are within range of you will AA.