You can change video setting in video mode by pressing ok and going to the codec selection. Pressing info lets you change frame rate. To change which options show up in that menu go to the movie menu and go to movie specification settings. Here you can bassically hoose four preets that show up in the live settings bar when in video mode. I have one set for all intra full hd and the other super fine full hd. I ignore the other two.
when in the live control panel you can see several options under the codecs. The first one is for shooting short clips. Pressing info lets you change the clip duration and frame rate. I don't use this. The second option I have set to all intra 24p full hd. I use this 99% of the time. Then I have settings for 50p, 60p and 25p. Im in china so i can't use 60p indoors with lights or Ill get the strobing effect so I have to use 50 for slowmo indoors. You can also use the last option before hd and sd to set up a slowmotion or fast motion preset. I set this to 24p and select super fine along with a x0.4 slowmotion effect. This shoots 60p and automatically exports it on a 24p time line giving you easy in camera slow motion.