THere are many things determining the video resolution. CLiq is my moms phone so i dont mess with it a lot. Here is what i can tell you
Resolutions - they are hard coded in the camera libs, u can see them on adb logcat and then seeing all the resolutions the application lists and change the resolution according in build.prop(for 2.1) and media_profiles.xml 2.2 and above

FPS- i havent seen if the fps are variable or constant, if they are constant they might be hard coded to not go less than taht(i think droid has constant so bug chance all moto phone have that)

Bitrate- well u can go to theoratically any bitrate limited by nand speeds practically. More the bitrate less the fps n vice versa