You’re seeing the latter.
I use the old railroad trick of honking the horn in a stuttering beep-beep-beep-beep-beep pattern and the turkeys scatter; if they’re posturing like the one in the video, they stop immediately and go back to looking like hens. Second last one I did that to flew straight up in the air, too.
While they can “jump” impressively, they are always back on the ground within one second.
I’ve never seen one actually fly. They’re just too fat.
Smart move!