[cuilin]

sweet, there's another fuji user here! i'm no expert on video, but on the rare occasions when i've used it i put it in manual mode and use the ae-l/af-l button to focus rather than the focus ring. if you're dead set on using auto focus make sure macro is turned off and you have the latest firmware installed. you could also try stopping down the aperture so that the dof isn't as shallow.