Video for 100D? Is it possible?
I had 1000D and followed CHDK. it is said that 1000D could have video and spot metering, there is a demo video of 40D shooting video, 1000D is theoritically capable of all the same software enabled fetures as 40D. But because no CHDK developers have 1000D, no one ever worked on it. 1000D is now 2.5 years old, I dont think they will ever work it.
to be honest even if it did get video, it will be 320 x 240 or something crappy like that, you much better off just but a 2011 P&S, or 1100D.