Using a relay I can switch back and forth from the FPV cam to a Canon Digital Still camera with my radio TX and only one downlink for lining up the AP shot. This recording is poor because it's recorded with a laptop usb device and not my Sony DV but it shows what I see as I pilot in realtime FPV mode.
HobbyWireless. com 900mhz TX/RX
HobbyWireless high res cam
Custom Twin Boom Rc plane
Dimension Engineering Battle Switch (used as Video Switch