Auto exposure is a useless function on a video camera IMO. An exposure mode that lets you get an initial auto exposure setting and then lock it so it doesn't change is useful. Does the Panasonic have this? I use this approach with my GL2, let it set exposure for a composition with the broadest possible range of scene values, lock it, then decide what scene values I will accept for 100% white highlights and use the 100% zebra to manually adjust the auto exposure setting to match. Generally I am shooting about 1 stop under the auto exposure setting.
TTL auto exposure settings are always a weighted average of the image composition at a point in time. If the mix of scene values changes in the frame the exposure changes to match. Unless the lighting changes drastically, these exposure shifts are unnecessary. On an overcast day outdoors this typically doesn't occur.
For any type of photography/videography I highly recommend learning Ansel Adams Zone exposure techniques. It gives you the visual skill to judge scene values outside of the camera and make appropriate creative choices about where to set exposure for any given condition.
TTL auto exposure settings are always a weighted average of the image composition at a point in time. If the mix of scene values changes in the frame the exposure changes to match. Unless the lighting changes drastically, these exposure shifts are unnecessary. On an overcast day outdoors this typically doesn't occur.
For any type of photography/videography I highly recommend learning Ansel Adams Zone exposure techniques. It gives you the visual skill to judge scene values outside of the camera and make appropriate creative choices about where to set exposure for any given condition.