Upload & Sell: On
The T4i is a decent video camera.
The sensor is the same as the T3i. But it has good still auto focus, 9 cross points from the 60D I understand.
For video it has a two stage heat sensor. I have run it 1.75 hours on 1 battery with no heat problem. The video auto focus is good enough to run it in place of a camcorder, with much higher quality.
The touch screen and face tracking auto focus can also both be useful.
Here are the video modes:
"Enhanced EOS Full HD Movie mode with Movie Servo AF for continuous focus tracking of moving subjects, manual exposure control and multiple frame rates (1080: 30p (29.97) / 24p (23.976) / 25p, 720: 60p (59.94) / 50p, 480: 30p (29.97) / 25p), built-in stereo microphone, manual audio level adjustment, and Video Snapshot with editing for expanded video shooting options"
You can find one for $600 new, or less for used on the Buy & Sell. Pretty decent camera for not much net cost if you can sell it for $450-$525 in 1 or 2 years.
Otherwise look at Magic Lantern on the 5DII, not sure what they can give you.