My RX-300 video looks just like yours - in fact most of the cams I've spent some time with (a dozen or so) seem+ to to a poor job of adjusting auto exposure mode. If I'm not just running up to the corner market, I'll access the menu and change to +1/3 or +2/3 for night time use. I have 2 Lukas cams (7500 and 7700) and they do even a worse job of auto exposure. My Livue HD does a pretty good job. G1W is about the same as RX-300. Seems to me this issue is given low priority for whatever reason by most manufactures (IMO).