ill probably have somebody disagree with my comment, but this is my settings. i film at f 11, iso 100 95% of the time, because they work and they are good for most shots. as far as frame rate/shutter, i always film at 720p 60fps (highest frame rate on my t2i). the shutter speed is where most of my variability comes from. ive found that anything over 1/120 looks fine for video, so i try to keep that as my lowest shutter speed (which i only need for darker days. i never film at night so that would be different but if i need anything brighter than that i will adjust the iso/aperature). for sunny days, ill normally shoot at about 1/250 or even higher
sparknotes: for really bright days, iso 100, f-11, and shutter around 1/250 at 60 fps