Ok, after some searching, I found the export filter settings...
However, the exported video appearance does not match that of the source video with similar A/V settings.
Example 1 = Source video (.3g2) with A/V settings, recorded with screen capture software. *
http://www.youtube.com/watch?v=ezvE6sUeUb0*
Example 2 = Source video with similar export filter settings (brightness/contrast) *
http://www.youtube.com/watch?v=7tQYXWX17zQ*
When the video gets brighter, the brightness dims and when the video gets darker, the brightness increases... contrast settings seemed to be ignored.
All I can say is.. what the HECK?
It's pretty sad when I have to rely on screen capture software to get the desired result! Luckily the source video was taken with a cell phone, so there was no noticeable loss in video quality.